Chronic Fatigue Syndrome/myalgic Encephalomyelitis Research Articles

A model of clinical symptoms in patients with chronic fatigue syndrome with postCOVID

Post-covid syndrome was defined as the presence of symptoms and/or signs of damage to various organ systems that develop during or after a previous COVID-19 infection persist for more than 12 weeks and cannot be explained by an alternative diagnosis. (A Quick Guide to COVID-19: Managing the Long-term Effects of COVID-19 (NG188). Chronic fatigue syndrome/myalgic encephalomyelitis (CFS/ME) can be described as a disease of unknown etiology characterized by the presence of permanent fatigue that does not recover after the proper rest, accompanied by various somatic symptoms. Establishment of the diagnosis is based on the analysis of clinical manifestations, however, due to their diversity; it takes a lot of time and medical experience. The application of the statistical analysis may allow simplifying and unifying this task. At the same time, considering diverse manifestations of the CFS/ME, one may allude that there are several different clinical variations of this disease and, therefore, symptoms can be grouped into "clusters". In this paper a possible correlation was revealed between various clinical symptoms of CFS/ME, using the principal component analysis (PCA) associated with the correlation coefficients of the Pearson’s matrix. A hypothetical physical model of the correlation of immunological symptoms was created. In addition to the positive correlation expected for the symptoms of one disease, negative relationships were also revealed, which may represent some unknown pathophysiological processes of CFS/ME and requires further study. The identification of key symptoms in patients of this group can contribute to the introduction of new diagnostic criteria, which will lead to an improvement in the quality of life and medical care for these patients.

EE238 Cost-Effectiveness of Online Cognitive Behavioral Therapy for Children with Chronic Fatigue Syndrome/Myalgic Encephalomyelitis (CFS/ME) Compared to Online Activity Management: FITNET-NHS Trial Findings

EE238 Cost-Effectiveness of Online Cognitive Behavioral Therapy for Children with Chronic Fatigue Syndrome/Myalgic Encephalomyelitis (CFS/ME) Compared to Online Activity Management: FITNET-NHS Trial Findings

Post-Acute Sequelae of COVID-19 (PASC) in Pediatrics: Factors That Impact Symptom Severity and Referral to Treatment.

The post-acute sequelae of COVID-19 (PASC) is a complex condition. While there are emerging studies on its effects in adults, there is scarce research regarding the long-term effects of COVID-19 infection among youth. Several researchers have likened long-haul COVID-19 to chronic fatigue syndrome/myalgic encephalomyelitis (CFS/ME) and postural orthostatic tachycardia syndrome (POTS). In adults, the prognosis for these diagnoses is less promising than that in youth; however, there is currently very little information available on the presentation of youth with PASC. A better understanding of the specific symptom presentation for youth diagnosed with PASC is necessary. Retrospective chart reviews were conducted collecting demographic data, COVID-19 symptoms and disease progression, and vaccination status. Additional data on referrals to a PASC treatment program and appointments attended were collected. Overall, data suggested that youth present with less severe PASC symptoms than adults, and the role of vaccination is unclear. These youth are often not referred to treatment programs. More exploration is necessary to continue to build an understanding of how best to aid youth diagnosed with PASC.

Complex Perspectives on CFS/ME and Fibromyalgia: An Interview with Dr. Geir Bjørklund

Abstract This interview-based paper explores chronic fatigue syndrome/myalgic encephalomyelitis (CFS/ME) and fibromyalgia through an interview with Dr. Geir Bjørklund, a Norwegian researcher. Delving into shared symptoms and overlapping aspects of these enigmatic conditions, the conversation highlights Dr. Bjørklund’s work on metal sensitivity and its potential links to autoimmune factors in fibromyalgia. The interview further explores therapeutic possibilities, including natural compounds and nutritional interventions, discussed in the context of CFS/ME and fibromyalgia. The promising trajectory of pharmacognosy and personalized interventions is examined, showcasing the convergence of conventional and natural therapies; Dr. Bjørklund’s insights guide understanding and addressing these complex conditions, advocating personalized care. The dialogue concludes by expressing gratitude to him, anticipating its contribution to the evolving field of research and treatment, inspiring further investigations, and enhancing the quality of life for those affected by CFS/ME and fibromyalgia.

Aetiological Understanding of Fibromyalgia, Irritable Bowel Syndrome, Chronic Fatigue Syndrome and Classificatory Analogues: A Systematic Umbrella Review.

This umbrella review systematically assesses the variety and relative dominance of current aetiological views within the scientific literature for the three most investigated symptom-defined functional somatic syndromes (FSS) and their classificatory analogues within psychiatry and psychology. An umbrella review of narrative and systematic reviews with and without meta-analyses based on a search of electronic databases (PubMed, Web of Science, Embase, PsychINFO) was conducted. Eligible reviews were published in English, focused on research of any kind of aetiological factors in adults diagnosed with fibromyalgia syndrome (FMS), irritable bowel syndrome (IBS), chronic fatigue syndrome/myalgic encephalomyelitis (CFS/ME), and somatic symptom disorder (SSD)/somatoform disorder (SFD). We included 452 reviews (132 systematic reviews including meta-analyses, 133 systematic reviews, 197 narrative reviews), of which 132 (29%) focused on two or more of the investigated health conditions simultaneously. Across diagnoses, biological factors were addressed in 90% (k = 405), psychological in 33% (k = 150), social in 12% (k = 54), and healthcare factors in 5% (k = 23) of the reviews. The methodological quality of the included systematic reviews (k = 255) was low (low/critically low: 41% [k = 104]; moderate: 49% [k = 126]; high quality: 10% [k = 25]). The high-quality systematic reviews suggest that deficient conditioned pain modulation, genetic factors, changes in the immune, endocrinological, gastrointestinal, cardiovascular, and nervous system, and psychosocial factors such as sexual abuse and pain catastrophizing increase the risk for FSS. Only very few systematic reviews have used comprehensive, biopsychosocial disease models to guide the selection of aetiological factors in FSS research. Future research should strive for higher scientific standards and broaden its perspective on these health conditions.

The experiences of remote consulting for people with chronic fatigue syndrome/myalgic encephalomyelitis (CFS/ME) and fibromyalgia in primary care.

Restrictions due to the COVID-19 pandemic resulted in a sudden shift to a predominantly remote consulting model in primary care from March 2020. Little evidence exists examining the experience of remote consulting for people living with chronic fatigue syndrome/myalgic encephalomyelitis (CFS/ME) or fibromyalgia, with the current literature focusing on the challenges faced by clinicians and people living with these conditions. Clinical guidance highlights the importance of building therapeutic relationships and personalising care, but it is unclear how this translates into a remote or virtual consulting space. To explore how people living with CFS/ME and fibromyalgia experience remote consulting with a primary care clinician, including synchronous and asynchronous methods, that is, e-consultation platforms, email, video, and telephone. Semi-structured interviews are being recorded and analysed thematically using a Foucauldian theoretical framework. Participants have been recruited across the West Midlands from a range of backgrounds. Recruitment is still ongoing. Preliminary analysis indicates that remote consulting is acceptable for these groups of patients, but only if they feel validated, listened to, and with a clinician who considers a holistic view with continuity of care. Remote consulting has presented new challenges for primary care, and it is important to identify which groups of patients are most suited. This study explores the views from a group of patients that are associated with some complexity, and complements the literature that explores the ability to deliver relationship-based care when consulting digitally/remotely. Recommendations from the findings will be created for use by patients and clinicians alike.

Grief in Chronic Illness: A Case Study of CFS/ME

This paper points to a more expansive conception of grief by arguing that the losses of illness can be genuine objects of grief. I argue for this by illuminating underappreciated structural features of typical grief — that is, grief over a bereavement — which are shared but under-recognized. I offer a common chronic illness, chronic fatigue syndrome/myalgic encephalomyelitis (CFS/ME), as a striking case study. I then use this analysis to highlight some clinical challenges that arise should this claim receive uptake in clinical practice. Extant literature on CFS/ME tells us that rates of comorbid depression are atypically high. If one accepts that people with CFS/ ME can grieve over losses associated with the condition, and that grief can be easily mistaken for depression in this context, this might suggest that rates of comorbid depression are inflated. I show, however, that the challenge of distinguishing between healthy and pathological grief arises in its place, and is just as tricky to solve.

Current knowledge about Chronic fatigue syndrome / myalgic encephalomyelitis (CFS/ME) causes – summary

Chronic Fatigue Syndrome (CFE) is a severe and disabling disease whose etiology has not yet been elucidated. This implies the lack of a specific biomarker for the diagnosis of PE, and no causal treatment. There are a number of diagnostic criteria that facilitate the diagnosis of PE, but it is still a diagnosis with exclusion. This chapter reviews the scientific literature systematically, summarizing the available knowledge about the probable etiology of Chronic Fatigue Syndrome. The current topic of the influence of SARS-Cov-2 virus infection on the development of symptoms of IPC was also taken into account in particular. A clear explanation of the etiology of PE is necessary for the further development of scientific knowledge about the Chronic Fatigue Syndrome.

Identifying disrupted biological factors and patient-tailored interventions for chronic fatigue in adolescents and young adults with Q-Fever Fatigue Syndrome, Chronic Fatigue Syndrome and Juvenile Idiopathic Arthritis (QFS-study): study protocol for a randomized controlled trial with single-subject experimental case series design

BackgroundChronic fatigue with a debilitating effect on daily life is a frequently reported symptom among adolescents and young adults with a history of Q-fever infection (QFS). Persisting fatigue after infection may have a biological origin with psychological and social factors contributing to the disease phenotype. This is consistent with the biopsychosocial framework, which considers fatigue to be the result of a complex interaction between biological, psychological, and social factors. In line, similar manifestations of chronic fatigue are observed in chronic fatigue syndrome/myalgic encephalomyelitis (CFS/ME) and juvenile idiopathic arthritis (JIA). Cognitive behavioral therapy is often recommended as treatment for chronic fatigue, considering its effectiveness on the group level. However, not everybody benefits on the individual level. More treatment success at the individual level might be achieved with patient-tailored treatments that incorporate the biopsychosocial framework.MethodsIn addition to biological assessments of blood, stool, saliva, and hair, the QFS-study consists of a randomized controlled trial (RCT) in which a single-subject experimental case series (N=1) design will be implemented using Experience Sampling Methodology in fatigued adolescents and young adults with QFS, CFS/ME, and JIA (aged 12–29). With the RCT design, the effectiveness of patient-tailored PROfeel lifestyle advices will be compared against generic dietary advices in reducing fatigue severity at the group level. Pre-post analyses will be conducted to determine relevance of intervention order. By means of the N=1 design, effectiveness of both advices will be measured at the individual level.DiscussionThe QFS-study is a comprehensive study exploring disrupted biological factors and patient-tailored lifestyle advices as intervention in adolescent and young adults with QFS and similar manifestations of chronic fatigue. Practical or operational issues are expected during the study, but can be overcome through innovative study design, statistical approaches, and recruitment strategies. Ultimately, the study aims to contribute to biological research and (personalized) treatment in QFS and similar manifestations of chronic fatigue.Trial registrationTrial NL8789. Registered July 21, 2020.

Research Paper of the Year 2021: relevant to training and beyond.

<h3>Objectives</h3> To define the prevalence of severe chronic fatigue syndrome/myalgic encephalomyelitis (CFS/ME) and its clinical characteristics in a geographically defined area of Northern England. To understand the feasibility of a community-based research study in the severely affected CFS/ME group. <h3>Design</h3> A two-phase clinical cohort study to pilot a series of investigations in participants own homes. <h3>Setting</h3> Participants were community living from the area defined by the Northern clinical network of the UK. <h3>Participants</h3> Adults with either a medical or a self-reported diagnosis of CFS/ME. Phase 1 involved the creation of a database. Phase 2: five participants were selected from database, dependent on their proximity to Newcastle. <h3>Interventions</h3> The De Paul fatigue questionnaire itemised symptoms of CFS/ME, the Barthel Functional Outcome Measure and demographic questions were collected via postal return. For phase 2, five participants were subsequently invited to participate in the pilot study. <h3>Results</h3> 483 questionnaire packs were requested, 63 were returned in various stages of completion. 56 De Paul fatigue questionnaires were returned: all but 12 met one of the CFS/ME criteria, but 12 or 22% of individuals did not fulfil the Fukuda nor the Clinical Canadian Criteria CFS/ME diagnostic criteria but 6 of them indicated that their fatigue was related to other causes and they barely had any symptoms. The five pilot participants completed 60% of the planned visits. <h3>Conclusions</h3> Severely affected CFS/ME individuals are keen to participate in research, however, their symptom burden is great and quality of life is poor. These factors must be considered when planning research and methods of engaging with such a cohort.

Functional Vitamin B12 deficiency in Chronic Fatigue Syndrome

Chronic Fatigue Syndrome/Myalgic encephalomyelitis (CFS/ME) is a complex chronic condition, characterized by periods of extreme fatigue, for which an underlying medical condition has previously not been identified. Many of the symptoms of CFS/ME, are, though, similar to those with vitamin B12 deficiency. In contrast to nutritional vitamin B12 deficiency, the majority of individuals with CFS have been shown to have functional vitamin B12 deficiency as well as functional vitamin B2 deficiency. This functional B12 deficiency occurred despite elevated serum B12 being found, and hence presents as Paradoxical vitamin B12 deficiency. As such, CFS due to functional B2 deficiency presents as Paradoxical B12 deficiency. Maintenance of vitamin B12 functional activity is critically dependent upon functional B2 sufficiency, and hence resolution of CFS there must first be resolution of functional B2 deficiency before treatment with vitamin B12 can be effective.

Why Should ACT Work When CBT Has Failed? a Study Assessing Acceptability and Feasibility of Acceptance and Commitment Therapy (ACT) for Paediatric Patients With Chronic Fatigue Syndrome/myalgic Encephalomyelitis (CFS/ME)

AimsPaediatric chronic fatigue syndrome/myalgic encephalomyelitis (CFS/ME) effects 0.5–3.28% of children. NICE guidance recommends Activity Management, Graded Exercise Therapy or Cognitive Behavioural Therapy for fatigue (CBT-f). Approximately 15% of patients do not achieve full recovery within one year with current treatments. Acceptance and Commitment Therapy (ACT) is an effective treatment in many chronic illnesses. There are no studies investigating ACT for paediatric CFS/ME. This feasability study aimed to assess if ACT is a feasible and acceptable alternative treatment when current treatment has not led to recovery.MethodsThis feasability cohort study aimed to enrol a minimum of 12 participants aged 11–18 yearswith CFS/ME attending the Royal United Hospitals Bath NHS Foundation Trust Specialist Paediatric CFS/ME Service, who were still symptomatic after 12 months or 12 sessions of standard treatment and were offered six to 12 sessions of ACT. Retention and recruitment data were analysed. Participants were asked to complete questionnaires before, during and after treatment. A selection of participants and their parents were interviewed about their experience of the study. Interviews were analysed using thematic analysis.Results19 participants (95% of those approached) were recruited. Only 4 participants of this hard-to-reach group did not complete treatment.In almost all sessions participants reported that they felt ‘totally’ listened to in post session questionnaires (31/33 sessions).Preliminary interviews (n = 12) indicate acceptability of ACT, with all young people and their parents stating that they thought ACT should be offered to this population. Participants particularly commented that the absence of thought challenging (used in CBT-f) was a positive element of ACT. Participant's openness to try new approaches and altruistic desire to be in a study was noted.ConclusionRecruitment data indicate that it is feasible to recruit and retain 11–18-year-olds with CFS/ME to a study offering ACT. Interviews with participants and parents were broadly positive suggesting ACT is an acceptable treatment in this population.Results indicated that it is both feasible and acceptable to offer ACT to 11–18-year-olds with CFS/ME using this protocol, supporting the prospect of an RCT in this area.

Chronic Fatigue Exhibits Heterogeneous Autoimmunity Characteristics Which Reflect Etiology.

Chronic fatigue syndrome/myalgic encephalomyelitis (CFS/ME) is considered to be associated with post-viral complications and mental stress, but the role of autoimmunity also remains promising. A comparison of autoimmune profiles in chronic fatigue of different origin may bring insights on the pathogenesis of this disease. Thirty-three patients with CFS/ME were divided into three subgroups. The first group included Herpesviridae carriers (group V), the second group included stress-related causes of chronic fatigue (distress, group D), and the third group included idiopathic CFS/ME (group I). Were evaluated thirty-six neural and visceral autoantigens with the ELISA ELI-test (Biomarker, Russia) and compared to 20 healthy donors, either without any fatigue (group H), or “healthy but tired” (group HTd) with episodes of fatigue related to job burnout not fitting the CFS/ME criteria. β2-glycoprotein-I autoantibodies were increased in CFS/ME patients, but not in healthy participants, that alludes the link between CFS/ME and antiphospholipid syndrome (APS) earlier suspected by Berg et al. (1999). In CFS/ME patients, an increase in levels of autoantibodies towards the non-specific components of tissue debris (double-stranded DNA, collagen) was shown. Both CFS and HTd subgroups had elevated level of autoantibodies against serotonin receptors, glial fibrillary acidic protein and protein S100. Only group V showed an elevation in the autoantibodies towards voltage-gated calcium channels, and only group D had elevated levels of dopamine-, glutamate- and GABA-receptor autoantibodies, as well as NF200-protein autoantibodies. Therefore, increased autoimmune reactions to the multiple neural antigens and to adrenal medullar antigen, but not to other tissue-specific somatic ones were revealed. An increase in autoantibody levels towards some neural and non-tissue-specific antigens strongly correlated with a CFS/ME diagnosis. Autoimmune reactions were described in all subtypes of the clinically significant chronic fatigue. Visceral complaints in CFS/ME patients may be secondary to the neuroendocrine involvement and autoimmune dysautonomia. CFS may be closely interrelated with antiphospholipid syndrome, that requires further study.

Individualizing medical treatment in chronic fatigue syndrome/ myalgic encephalomyelitis: Evidence for effective medications and possible relevance to “Long-Hauler Syndrome” in Covid-19 affected patients

Large controlled studies of Chronic Fatigue Syndrome/Myalgic Encephalomyelitis (CFS/ME) have shown no effective medical treatment for this disorder. There are individual patients, however, with dramatic responses to some medications. We report two patients with clear responses to rintatolimid and galantamine characterized by rapid reduction of symptoms on starting treatment and return of symptoms on withdrawal. As in cancer, CFS/ME is a heterogeneous disorder but unlike most cancers, such as melanoma, breast cancer, and B-cell lymphoma, CFS/ME has no known biological marker that can distinguish between subtypes. We suggest an approach to medical treatment of CFS/ME that could be utilized by primary caregivers that offer the possibility of more rapid and complete recovery from this debilitating disorder. Current studies indicate that prolonged symptomatic recovery from infection with Covid-19 (“long hauler syndrome” or PASC, for post-acute sequelae of Covid-19) represents a severe form of CFS/ME and thus may also be amenable to personalized medicine with specific medications.

Experiences of pain in paediatric chronic fatigue syndrome/myalgic encephalomyelitis: a single-centre qualitative study

BackgroundModerate to severe pain affects up to two-thirds of children with chronic fatigue syndrome/myalgic encephalomyelitis (CFS/ME) and is associated with worse fatigue and physical functioning. This research aims to gain...

New NICE guideline on chronic fatigue syndrome: more ideology than science?

The National Institute for Health and Care Excellence (NICE) in the UK published a new chronic fatigue syndrome/myalgic encephalomyelitis (CFS/ME) guideline in October, 2021. 1 National Institute for Health and Care ExcellenceMyalgic encephalomyelitis (or encephalopathy)/chronic fatigue syndrome: diagnosis and management. NICE guideline [NG206]. https://www.nice.org.uk/guidance/ng206Date: Oct 29, 2021 Date accessed: January 13, 2022 Google Scholar The previous NICE 2007 guideline recommended cognitive behavioural therapy (CBT) and graded exercise therapy (GET) for people with mild or moderate CFS/ME based on evidence from randomised trials. 2 Baker R Shaw EJ Diagnosis and management of chronic fatigue syndrome or myalgic encephalomyelitis (or encephalopathy): summary of NICE guidance. BMJ. 2007; 335: 446-448 Crossref PubMed Scopus (79) Google Scholar Since then, more randomised trials and systematic reviews have provided additional evidence supporting these recommendations. 3 Price JR Mitchell E Tidy E Hunot V Cognitive behaviour therapy for chronic fatigue syndrome in adults. Cochrane Database Syst Rev. 2008; 3CD001027 Google Scholar , 4 Larun L Brurberg KG Odgaard-Jensen J Price JR Exercise therapy for chronic fatigue syndrome. Cochrane Database Syst Rev. 2019; 10CD003200 PubMed Google Scholar , 5 Castell BD Kazantzis N Moss-Morris R Cognitive behavioral therapy and graded exercise for chronic fatigue syndrome: a meta-analysis. Clin Psychol Sci Pract. 2011; 18: 311-324 Crossref Scopus (133) Google Scholar , 6 White PD Goldsmith KA Johnson AL et al. Comparison of adaptive pacing therapy, cognitive behaviour therapy, graded exercise therapy, and specialist medical care for chronic fatigue syndrome (PACE): a randomised trial. Lancet. 2011; 377: 823-836 Summary Full Text Full Text PDF PubMed Scopus (622) Google Scholar , 7 Nijhof SL Bleijenberg G Uiterwaal CS et al. Effectiveness of internet-based cognitive behavioural treatment for adolescents with chronic fatigue syndrome (FITNET): a randomised controlled trial. Lancet. 2012; 379: 1412-1418 Summary Full Text Full Text PDF PubMed Scopus (153) Google Scholar , 8 Gotaas ME Stiles TC Bjørngaard JH Borchgrevink PC Fors EA Cognitive behavioral therapy improves physical function and fatigue in mild and moderate chronic fatigue syndrome: a consecutive randomized controlled trial of standard and short interventions. Front Psychiatry. 2021; 12580924 Crossref PubMed Scopus (6) Google Scholar No new or more effective interventions have been identified. Although we applaud guideline efforts, it is remarkable that recommendations in the 2021 NICE guideline differ substantially from the previous one, and do not include CBT and GET as means to treat CFS/ME. The new guideline presents strengthened evidence, but a major shift in interpretation. How could this happen?

Commonalities in the Features of Cancer and Chronic Fatigue Syndrome (CFS): Evidence for Stress-Induced Phenotype Instability?

Chronic Fatigue Syndrome/Myalgic Encephalomyelitis (CFS/ME) and Cancer-Related Fatigue (CRF) are syndromes with considerable overlap with respect to symptoms. There have been many studies that have compared the two conditions, and some of this research suggests that the etiologies of the conditions are linked in some cases. In this narrative review, CFS/ME and cancer are introduced, along with their known and putative mechanistic connections to multiple stressors including ionizing radiation. Next, we summarize findings from the literature that suggest the involvement of HPA-axis dysfunction, the serotonergic system, cytokines and inflammation, metabolic insufficiency and mitochondrial dysfunction, and genetic changes in CRF and CFS/ME. We further suspect that the manifestation of fatigue in both diseases and its causes could indicate that CRF and CFS/ME lie on a continuum of potential biological effects which occur in response to stress. The response to this stress likely varies depending on predisposing factors such as genetic background. Finally, future research ideas are suggested with a focus on determining if common biomarkers exist in CFS/ME patients and those afflicted with CRF. Both CFS/ME and CRF are relatively heterogenous syndromes, however, it is our hope that this review assists in future research attempting to elucidate the commonalities between CRF and CFS/ME.

What treatments work for anxiety and depression in children and adolescents with chronic fatigue syndrome? An updated systematic review

ObjectivesChildren with chronic fatigue syndrome/myalgic encephalomyelitis (CFS/ME) experience a higher prevalence of depression and anxiety compared with age-matched controls. Our previous systematic reviews in 2015/16 found little evidence for effective...

Using Communities of Practice Theory to Understand the Crisis of Identity in Chronic Fatigue Syndrome/Myalgic Encephalomyelitis (CFS/ME).

To explore the crisis of identity in Chronic Fatigue Syndrome/Myalgic Encephalomyelitis (CFS/ME) through the lens of Communities of Practice. A closed Facebook group was created to gather qualitative data from participants diagnosed with CFS/ME (n = 22). Data were analysed using a theoretical thematic analysis. The current research revealed the reality of enabling and disabling communities in the lived experience of CFS/ME and the role of participation in developing empowered identities. Learning how to be alongside CFS/ME aligned with participants' experiences of purpose and meaning. New identities may be developed which are not centrally defined by loss or stigma. Participation in supportive communities enables CFS/ME identities to emerge as a platform for positive change. Engaging with the CFS/ME virtual community may be a way for both families and health professionals to reflect on current practice.

Factors related to educational adaptations and social life at school experienced by young people with CFS/ME: a qualitative study

ObjectivesTo explore factors perceived as positive or negative among young people with chronic fatigue syndrome/myalgic encephalomyelitis (CFS/ME) in relation to school and everyday life.DesignA qualitative study with semistructured individual interviews...