1. Division of Hematology and Oncology, University of Virginia Medical Center, Charlottesville, VA, USA
2. Haemostasis and Thrombosis Unit, Division of Hematology, Cliniques Universitaires Saint-Luc, Brussels, Belgium
3. Department of Hemato-oncology, Østfold Hospital, and Department of Hematology, Institute of Clinical Medicine, Oslo University, Oslo, Norway