1. Department of PathologyDivision of Transfusion Medicine and HemostasisUT Southwestern Medical CenterDallas Texas
2. Duke University Medical CenterDurham North Carolina
3. Laboratory Corporation of AmericaBurlington North Carolina
4. University of North CarolinaChapel Hill North Carolina
5. Hemapheresis and Blood ServicesThe Institute for Transfusion Medicine and School of MedicineUniversity of Pittsburgh Pennsylvania
6. Department of PathologyDivision of Laboratory MedicineUniversity of Alabama at BirminghamBirmingham Alabama
7. Department of Pathologyand Department of MedicineDartmouth Hitchcock Medical CenterLebanon New Hampshire
8. Department of Laboratory Medicine and PathologyDivision of Transfusion MedicineMayo ClinicRochester Minnesota