1. Research InstituteCalifornia Pacific Medical Center San Francisco California
2. Department of Epidemiology and BiostatisticsUniversity of California San Francisco San Francisco California
3. University of Florida Gainesville Florida
4. Department of EpidemiologyUniversity of Pittsburgh Pittsburgh Pennsylvania
5. Marcus Institute for Aging ResearchHebrew SeniorLife, Department of Medicine Beth Israel Deaconess Medical Center and Harvard Medical School Boston Massachusetts
6. Center for Chronic Disease Outcomes ResearchMinneapolis VA Health Care System Minneapolis Minnesota
7. Division of Epidemiology and Community HealthUniversity of Minnesota Minneapolis Minnesota
8. Department of MedicineUniversity of Minnesota Minneapolis Minnesota
9. Division of Geriatric Medicine and Gerontology and Center on Aging and HealthJohns Hopkins Medical Institute Baltimore Maryland
10. Longitudinal Studies SectionThe National Institute on Aging Baltimore Maryland
11. University of Colorado Denver‐Anschutz Medical Campus Aurora Colorado
12. Nutrition, Exercise, Physiology, and Sarcopenia Laboratory, Jean Mayer US Department of Agriculture Human Nutrition Research Center on AgingTufts University Boston Massachusetts
13. Department of Epidemiology and Public HealthUniversity of Maryland School of Medicine Baltimore Maryland
14. Department of Medicine & Therapeutics and School of Public Health, Faculty of MedicineThe Chinese University of Hong Kong New Territories Shatin Hong Kong
15. Department of Clinical Sciences in MalmoLund University Malmo Sweden
16. Centre of Bone and Arthritis Research, Department of Internal Medicine and Clinical NutritionInstitute of Medicine, Sahlgrenska Academy, University of Gothenburg Gothenburg Sweden
17. Charles Perkins CentreUniversity of Sydney Sydney Australia
18. Department of surgical sciences, Orthopeadic UnitUppsala University Uppsala Sweden
19. The National Institute on Aging Bethesda Maryland
20. Boston Claude D. Pepper Older Americans Independence CenterBrigham and Women's Hospital, Harvard Medical School Boston Massachusetts