1. University of Pittsburgh Medical Center Pittsburgh PA USA
2. Hemophilia Center of Western Pennsylvania Pittsburgh PA USA
3. Children's Hospital of Pittsburgh Pittsburgh PA USA
4. Duke University Medical Center Durham NC USA
5. Georgetown University Medical Center Washington DC USA
6. BloodWorks Northwest Seattle WA USA
7. Rochester General Hosp. Rochester NY USA
8. Cleveland Clinic Foundation Cleveland OH USA
9. Rutgers Robert Wood Johnson Medical School New Brunswick NJ USA
10. Research Triangle Institute International Rockville MD USA