1. Department of Population Health Sciences, University of Wisconsin School of Medicine and Public Health, Madison, WI
2. Department of Ophthalmology and Visual Sciences, University of Wisconsin School of Medicine and Public Health, Madison, WI
3. Department of Epidemiology and Biostatistics, Case Western Reserve University, Cleveland, OH
4. Department of Medicine, University of Iowa, Iowa City, IA
5. Department of Epidemiology, University of Iowa, Iowa City, IA
6. Department of Obstetrics and Gynecology, University of Wisconsin School of Medicine and Public Health, Madison, WI
7. Casey Eye Institute, Oregon Health and Science University, Portland, OR
8. Fred Hutchinson Cancer Research Center, Seattle, WA
9. Kaiser Permanente Center for Health Research, Portland, OR
10. Department of Internal Medicine, Ohio State Wexner Medical Center, Columbus, OH
11. Division of Preventive Medicine, Brigham and Women's Hospital, Boston, MA
12. Department of Epidemiology, Harvard School of Public Health, Boston, MA
13. Department of Social and Preventive Medicine, The State University of New York, Buffalo, NY