From the Centre for Environmental and Preventive Medicine, Wolfson Institute of Preventive Medicine, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, United Kingdom (F.J.H., G.A.M.). Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, MA (Y.M.). Departments of Medicine (N.R.C.C.), O'Brien Institute of Public Health, Libin Cardiovascular Institute of Alberta at the University of Calgary, Canada. Community Health Sciences (N.R.C.C.), O'Brien Institute of Public Health, Libin Cardiovascular Institute of Alberta at the University of Calgary, Canada. Physiology and Pharmacology (N.R.C.C.), O'Brien Institute of Public Health, Libin Cardiovascular Institute of Alberta at the University of Calgary, Canada. Division for Heart Disease and Stroke Prevention, National Center for Chronic Disease Prevention and Health Promotion, Centers for Disease Control and Prevention, Atlanta, GA (M.E.C.). Division of Preventive Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA (N.R.C.).