1. Department of Radiation Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer HospitalChinese Academy of Medical Sciences and Peking Union Medical College Beijing China
2. Metabolic Epidemiology BranchNational Cancer Institute Division of Cancer Epidemiology and Genetics, Bethesda Maryland USA
3. Department of Gynecological OncologyHenan Cancer Hospital Zhengzhou China
4. Tobacco Control Research BranchNational Cancer Institute Division of Cancer Control and Population Sciences, Bethesda, Maryland USA
5. Office of Cancer Registry, National Cancer Center/National Clinical Research Center for Cancer/Cancer HospitalChinese Academy of Medical Sciences and Peking Union Medical College Beijing China