Department of Epidemiology, Geisel School of Medicine at Dartmouth, Lebanon, NH, USA.|Department of Biostatistics, Oregon State University College of Public Health and Human Sciences, Corvallis, OR, USA.|Department of Epidemiology, Geisel School of Medicine at Dartmouth, Lebanon, NH, USA Department of Pharmacology and Toxicology, Geisel School of Medicine at Dartmouth, Lebanon, NH, USA.|Department of Epidemiology, Geisel School of Medicine at Dartmouth, Lebanon, NH, USA Department of Pharmacology and Toxicology, Geisel School of Medicine at Dartmouth, Lebanon, NH, USA Department of Community and Family Medicine, Geisel School of Medicine at Dartmouth, Lebanon, NH, USA.