1. Institute of Digestive Endoscopy and Medical Center for Digestive Diseases; Second Affiliated Hospital of Nanjing Medical University; Nanjing China
2. Department of Health Promotion; Wuxi Center for Disease Prevention and Control; Wuxi China
3. Department of Epidemiology and Biostatistics; Ministry of Education (MOE) Key Laboratory of Modern Toxicology, School of Public Health, Nanjing Medical University; Nanjing China
4. Section of Clinical Epidemiology; Jiangsu Key Lab of Cancer Biomarkers, Prevention and Treatment, Cancer Center, Nanjing Medical University; Nanjing China
5. Medical Lab; Northern Jiangsu People's Hospital; Yangzhou China
6. Department of Gastroenterology; Yangzhou First People's Hospital; Yangzhou China
7. State Key Laboratory of Reproductive Medicine; Institute of Toxicology; Nanjing Medical University; Nanjing China