1. Platelet Disorders Center, Department of Pediatrics, Weill-Cornell Medical College, New York, NY;
2. Department of Haematology, University College London Hospital, London, United Kingdom;
3. Department of Haematology, Imperial College School of Medicine, Hammersmith Hospital, London, United Kingdom;
4. Department of Medicine, Laboratory for Thrombosis Research, Kantonsspital Baden, Baden, Switzerland;
5. Department of Pathology and Laboratory Medicine, Weill-Cornell Medical College, New York, NY; and
6. Puget Sound Blood Centre, University of Washington School of Medicine, Seattle, WA