1. Department of Kinesiology and Community Health; University of Illinois at Urbana-Champaign; Champaign Illinois
2. Public Health Sciences Division; Fred Hutchinson Cancer Research Center; Seattle Washington
3. Department of Epidemiology and Environmental Health; University at Buffalo of The State University New York; Buffalo New York
4. Department of Epidemiology; University of North Carolina at Chapel Hill; Chapel Hill North Carolina
5. Kaiser Permanente Washinton Health Research Institute; Seattle Washington
6. Division of Preventive Medicine; Brigham and Women's Hospital; Harvard Medical School; Boston Massachusetts
7. Department of Biostatistics; University of North Carolina at Chapel Hill; Chapel Hill North Carolina
8. Department of Medicine; University of Alabama at Birmingham; Birmingham Alabama
9. Departments of Medicine and Obstetrics and Gynecology; Stanford University; Palo Alto California
10. Department of Family Medicine and Public Health; University of California, San Diego; San Diego California