1. From the Institute of Occupational Medicine and the Ministry of Education Key Lab of Environment and Health, School of Public Health (L.Z., X.Z., M.H., T.W.); the Department of Cardiology, Union Hospital, (L.C., Y.C.), Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China; and the Departments of Nutrition and Epidemiology (F.B.H), Harvard School of Public Health, Boston, Mass.