Abbreviations: BCS, Budd–Chiari syndrome; LMWH, Lowmolecular-weight heparin; APTT, Activated partial thromboplastin time; HIT, Heparin-induced thrombocytopenia. ⁎ Corresponding author. Coagulation Disorders, Division of Hematology, Department of Medicine, Helsinki University Central Hospital, P.O. Box 340, 00029 HUS, Helsinki, Finland. Tel.: +358 40 517 5547; fax: +358 9 471 74504. E-mail address: riitta.lassila@hus.fi (R. Lassila).