1. National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College Beijing China
2. Metabolic Epidemiology Branch Division of Cancer Epidemiology & Genetics National Cancer InstituteNational Institutes of Health Rockville Maryland
3. Biostatistics Branch Division of Cancer Epidemiology & Genetics National Cancer InstituteNational Institutes of Health Bethesda Maryland
4. Information Management Services Inc Calverton Maryland