1. From the Departments of Environmental Health Sciences (AEA, KEP, and LSR) and Biostatistics (JMGT), University of Michigan School of Public Health, Ann Arbor, MI; the Department of Nutrition, Harvard School of Public Health, Boston, MA (KEP); the Departments of Otolaryngology (LSR, DBC, JET, GTW, and SAD) and Psychiatry (SAD), University of Michigan Medical School, Ann Arbor, MI; the Biostatistic