1. Department of Environmental Health, and
2. Department of Biostatistics, Harvard T.H. Chan School of Public Health, Boston, Massachusetts, USA
3. Institute of Epidemiology, Helmhotz Zentrum München–German Research Center for Environmental Health, Neuherberg, Germany
4. Department of Clinical Sciences and Community Health, Center of Molecular and Genetic Epidemiology, Università degli Studi di Milano, Milan, Italy
5. Fondazione Cà Granda, IRCCS (Istituto Di Ricovero e Cura a Carattere Scientifico) Ospedale Maggiore Policlinico, Milan, Italy
6. VA Normative Aging Study, VA Boston Healthcare System, Boston, Massachusetts, USA
7. Department of Medicine, Boston University School of Medicine, Boston, Massachusetts, USA