1. 1Division of Hematology/Oncology, Department of Medicine, Larner College of Medicine at the University of Vermont, Burlington, VT
2. 2Division of Clinical Pathology, Department of Medicine, Larner College of Medicine at the University of Vermont, Burlington, VT
3. 3Washington Center for Bleeding Disorders, Seattle, WA
4. 4Division of Hematology, Department of Medicine, University of Washington, Seattle, WA