1. Department of Epidemiology and Biostatistics, School of Public Health; Nanjing Medical University; Nanjing 211166 China
2. Jiangsu Key Lab of Cancer Biomarkers, Prevention and Treatment, Collaborative Innovation Center For Cancer Personalized Medicine; Nanjing Medical University; Nanjing 211166 China
3. Nanjing Maternal and Child Health Institute, Nanjing Maternal and Child Health Care Hospital; Obstetrics and Gynecology Hospital Affiliated to Nanjing Medical University; Nanjing 210004 China
4. State Key Laboratory of Molecular Oncology and Department of Etiology and Carcinogenesis; Cancer Institute and Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College; Beijing 100021 China