1. Department of Gastroenterology People's Hospital of Longhua District of Shenzhen Shenzhen China
2. Cancer Prevention Cancer Sun Yat‐sen University Cancer CenterState Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine Guangzhou China
3. Department of Epidemiology and Environmental Health School of Public Health and Health Professions the State University of New York at Buffalo Buffalo NY USA
4. Department of Endoscopy Sun Yat‐sen University Cancer CenterState Key Laboratory of Oncology in South ChinaCollaborative Innovation Center for Cancer Medicine Guangzhou China