1. From the Slone Epidemiology Center at Boston University, Boston, MA (P.F.C., J.R.P., L.R.); Department of Biostatistics, Boston University School of Public Health, Boston, MA (L.F.W.); Division of Environmental Health Sciences, School of Public Health, University of California, Berkeley (M.J., J.G.S., E.S.); Division of Cardiovascular Medicine, University of Michigan Medical School, Ann Arbor (R.D.B.); and Healthy Environments and Consumer Safety Branch, Health Canada, Ottawa, ON, Canada (R.B.).