1. Center for Comprehensive Care & Diagnosis of Inherited Blood Disorders and Department of Pediatrics; University of California Los Angeles; Orange; CA
2. Hemophilia and Thrombosis Center; University of Colorado Health Sciences Center; Denver; CO
3. Gulf States Hemophilia and Thrombophilia Center; University of Texas Health Science Center at Houston; Houston; TX
4. New England Hemophilia Center; UMass Memorial Hospital; Worcester; MA
5. Winston-Salem; NC
6. Mount Sinai Regional Comprehensive Hemophilia Treatment Center; Mount Sinai School of Medicine; New York; NY,; USA