1. Duke University Medical Center, Durham, North Carolina
2. Department of Medical Social Sciences, Feinberg School of Medicine, Northwestern University, Chicago, Illinois
3. Medical College of Wisconsin, Milwaukee, Wisconsin
4. National Institute of Diabetes and Digestive and Kidney Diseases, Bethesda, Maryland
5. Arbor Research Collaborative for Health, Ann Arbor, Michigan
6. Washington University School of Medicine, St. Louis, Missouri
7. University of Washington, Seattle, Washington
8. University of Michigan, Ann Arbor, Michigan
9. Department of Obstetrics and Gynecology, Carver College of Medicine, University of Iowa, Iowa City, Iowa