1. Department of Medicine, London Health Sciences Center, London, Ontario, Canada
2. Department of Public Health Sciences, Wake Forest University School of Medicine, Winston-Salem, NC
3. Department of Laboratory Medicine and Pathology, University of Minnesota, Minneapolis, MN
4. MDS Laboratories, Toronto, Ontario, Canada
5. Division of Hematology/Oncology, Department of Medicine, University of California, Irvine, CA, and Veterans Affairs Long Beach Healthcare System, Long Beach, CA
6. Epidemiology Division, Department of Medicine, University of California, Irvine, CA
7. Department of Medicine, Howard University, Washington, DC
8. Departments of Microbiology, Medicine, and Epidemiology and International Health, University of Alabama at Birmingham, Birmingham, AL
9. Southern Iron Disorders Center, Birmingham, AL
10. Kaiser Permanente Center for Health Research, Portland, OR
11. Department of Pathology, Oregon Health & Science University, Portland, OR
12. Division of Blood Diseases and Resources, National Heart Lung and Blood Institute, NIH, US Department of Health and Human Services, Bethesda, MD