1. Department of Geriatrics and Aging Research, University Hospital Zurich and Waid City Hospital, University of Zurich, Zurich, Switzerland
2. Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts
3. Research Program in Men’s Health: Aging and Metabolism, and the Boston Claude D. Pepper Older Americans Independence Center, Boston, Massachusetts
4. Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, Massachusetts