1. Department of Cancer Epidemiology, National Cancer Center, Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, PR China
2. School of Public Health, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, PR China
3. Department of Gynecological Oncology, Chongqing Cancer Institute & Hospital & Cancer Center, Chongqing, PR China
4. Department of Pathology, National Cancer Center, Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, PR China
5. Department of Gynecology and Obstetrics, The West China Second University Hospital, Sichuan University, Chengdu, PR China