1. Hemophilia and Coagulation Disorders Program; Division of Hematology-Oncology; University of Michigan School of Medicine; Ann Arbor; MI
2. Penn Comprehensive Hemophilia and Thrombosis Program; Division of Hematology-Oncology; University of Pennsylvania; Philadelphia; PA
3. Centers for Disease Control (CDC); Atlanta; GA
4. Division of Hematology; Duke University School of Medicine; Durham; NC
5. Puget Sound Blood Center and University of Washington; Seattle; WA