1. HealthPartners Research Foundation, Bloomington, MN
2. Department of Biostatistics, University of Arkansas for Medical Science, Little Rock, AR
3. University of Washington, Seattle, WA
4. Medstar Research Institute, Hyattsville, MD
5. Department of Epidemiology, University of California, Los Angeles, CA
6. Brigham and Women's Hospital, Harvard Medical School, Boston, MA
7. Albert Einstein College of Medicine, Bronx, NY
8. Emory University, Atlanta, GA
9. University of Alabama, Birmingham, AL
10. Fred Hutchinson Cancer Research Center, Seattle, WA