1. Department of Laboratory Medicine; University of Washington; Seattle Washington
2. Department of Pathology; University of Michigan; Ann Arbor Michigan
3. Division of Hematology; University of Washington; Seattle Washington
4. University of Alabama School of Medicine; Birmingham Alabama
5. Department of Pathology; University of Alabama at Birmingham; Birmingham Alabama
6. Department of Pathology; University of Iowa; Iowa City Iowa
7. Division of Transfusion Medicine; Johns Hopkins Medical Institutions; Baltimore Maryland
8. Health Division; IMPAQ International; Columbia Maryland
9. Bloodworks Northwest; Seattle Washington
10. Division of Laboratory Medicine, Departments of Pediatrics and Pathology, Children's National Medical Center; George Washington School of Medicine and Health Sciences; Washington DC
11. Department of Laboratory Medicine and Pathology, Division of Transfusion Medicine; Mayo Clinic; Rochester Minnesota.