1. From the Department of Epidemiology, Harvard School of Public Health, Boston, MA (L.S.-M., J.S., D.M.); Research Centre in Physical Activity, Health and Leisure, Faculty of Sport, University of Porto, Portugal (L.S.-M.); Benjamin Leon Center for Geriatric Research and Education and Department of Medicine, Herbert Wertheim College of Medicine, Florida International University, Miami, FL (P.C.); Department of Epidemiology, University of Washington, Seattle, WA (G.E.D., D.S.S.); Department of Medicine,...