Allogeneic Haematopoietic Stem Cell Transplantation for Systemic Onset Juvenile Idiopathic Arthritis Juliana Silva , Julie Glanville , Fani Ladomenou, Rachael Hough , Ben Carpenter , Vicky Grandage , Kanchan Rao , Persis Amrolia , Robert Chiesa , Paul Brogan , Mark Friswell , Andrew J. Cant , Zohreh Nademi , Mary Slatter , MarioAbinun, PaulVeys . 1 Blood and Marrow Transplantation Program, Great Ormond Street Hospital for Children NHS Trust, London, United Kingdom; Department of Bone Marrow Transplantation, Great North Children’s Hospital, Newcastle upon Tyne, United Kingdom; University College Hospital London, London, United Kingdom; Great Ormond Street Hospital for Children, London, United Kingdom; Rheumatology Department, Great Ormond Street Hospital, London, United Kingdom; Great North Children’s Hospital, Newcastle upon Tyne, United Kingdom; Department of Paediatrics Immunology, Great North Children’s Hospital, Newcastle upon Tyne, United Kingdom; Department of Bone Marrow Transplantation, Great North Children’s Hospital, Newcastle, United Kingdom; Great North Children’s Hospital, Newcastle, United Kingdom; 10 Child Health Department, Great North Children’s Hospital, Newcastle upon Tyne, United Kingdom