1. Department of Pediatrics East Carolina University, Vidant Medical Center Greenville North Carolina USA
2. Medical Center Library Duke University Medical Center Durham North Carolina USA
3. Department of Pediatrics and Pathology George Washington School of Medicine and Health Sciences Washington, DC USA
4. Department of Coagulation Quest Diagnostics, Nichols Institute Centreville Virginia USA
5. Department of Pathology University of New Mexico Albuquerque New Mexico USA
6. Department of Pathology and Laboratory Medicine University of Arkansas for Medical Sciences Little Rock Arkansas USA
7. Department of Medicine Vitalant Northeast Division and The University of Pittsburgh Pittsburgh Pennsylvania USA
8. Department of Pathology and Laboratory Medicine University of Kentucky Health Care Lexington Kentucky USA
9. Department of Laboratory Medicine and Pathology Mayo Clinic Arizona Phoenix Arizona USA
10. Department of Laboratory Medicine and Pathology University of Minnesota Minneapolis Minnesota USA
11. Department of Medicine Duke University School of Medicine Durham North Carolina USA