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From the Clinical Trial Service Unit and the Epidemiological Studies Unit (H.D., D.B.,
P.S., H.G., Y.C., L.Y., R.C., R.P., Z.C.) and the Cancer Epidemiology Unit (T.J.K.),
Nuffield Department of Population Health, University of Oxford, Oxford, United Kingdom;
and the Department of Epidemiology and Biostatistics, School of Public Health, Peking
University Health Science Center (L.L.), the Chinese Academy of Medical Sciences (L.L.,
Y.G., Z.B.), and the China National Center for Food Safety Risk Assessment ( J.C.),
Beijing, Hainan Center for Disease Control (CDC), Haikou (S.W.), Qingdao CDC, Qingdao
(R.D.), and Heilongjiang CDC, Harbin (H.S.) - all in China.