1. Department of Cancer Epidemiology Cancer Institute/Hospital Chinese Academy of Medical Sciences and Peking Union Medical College BeijingChina
2. Department of Epidemiology and Health Statistics School of Public Health Zhejiang University Hangzhou China
3. Nutritional Epidemiology BranchDivision of Cancer Epidemiology and Genetics National Cancer Institute Rockville Maryland USA
4. Genetic Epidemiology Branch Division of Cancer Epidemiology and Genetics National Cancer Institute Rockville Maryland USA