1. Department of Epidemiology & Biostatistics, University of Western Ontario, London, Canada.
2. Southern Iron Disorders Center, Birmingham, Alabama.
3. Department of Public Health Sciences, Wake Forest University School of Medicine, Winston-Salem, North Carolina.
4. London Health Sciences Centre, London, Canada.
5. National Human Genome Research Institute, National Institutes of Health, Bethesda, Maryland.
6. Microbiology/Immunogenetics Program, University of Alabama at Birmingham, Birmingham, Alabama.
7. Howard University, Washington, District of Columbia.
8. Department of Medicine, Center for Health Policy Research, University of California, Irvine, California.