Anhui Medical University - Department of Epidemiology and Biostatistics, Fudan University - Cancer Institute, Nanjing Medical University - Department of Epidemiology, Nanjing Medical University - Department of Epidemiology, Yangzhou University - Department of Laboratory Medicine, Nanjing Medical University - Department of General Surgery, Yangzhou University - Department of Gastroenterology, Chinese Academy of Sciences (CAS) - Zhejiang Provincial Office for Cancer Prevention and Control, Chinese Academy of Sciences (CAS) - Zhejiang Provincial Office for Cancer Prevention and Control, Nanjing Medical University - Department of Epidemiology, Nanjing Medical University - Department of Epidemiology, Fudan University - Department of Gastric Cancer and Soft Tissue Sarcomas, Fudan University - Department of Gastric Cancer and Soft Tissue Sarcomas, Nanjing Medical University - Department of Epidemiology, Nanjing Medical University - Department of Epidemiology, Nanjing Medical University - Department of Epidemiology, Nanjing Medical University - State Key Laboratory of Reproductive Medicine, Nanjing Medical University - Department of Epidemiology and Biostatistics, Duke University - Duke Cancer Institute and Nanjing Medical University - Department of Epidemiology