1. Duke University Durham NC USA
2. Puget Sound Blood Center Seattle WA USA
3. University of Washington Seattle WA USA
4. Rochester General Hospital Rochester NY USA
5. University of Pittsburgh Pittsburgh PA USA
6. Hemophilia Center of Western Pennsylvania Pittsburgh PA USA
7. Indiana Hemophilia & Thrombosis Center Indianapolis IN USA
8. University of Michigan Ann Arbor MI USA
9. Columbus OH USA
10. Rutgers Robert Wood Johnson Medical School New Brunswick NJ USA