1. Department of Gastroenterology and Hepatology, Tianjin Medical University General Hospital , Anshan Road 154, Heping District, Tianjin 300052 , China
2. Tianjin Institute of Digestive Disease, Tianjin Medical University General Hospital , Anshan Road 154, Heping District, Tianjin 300052, China
3. Department of Gastroenterology, Nanjing Drum Tower Hospital, Graduate School of Peking Union Medical College, Chinese Academy of Medical Sciences & Peking Union Medical College , Jiangsu, Nanjing, 210008 , China
4. Department of Health Management, Tianjin Hospital , No. 406 Jiefang South Road, Hexi District, Tianjin 300211 , China
5. Department of Internal Medicine, Tianjin Hexi Hospital , Qiongzhou Road 43, Hexi District, Tianjin 300202 , China
6. Department of Gastroenterology, Tianjin Medical University General Hospital Airport Hospital , East Street 6, Tianjin Airport Economic Area, Tianjin 300308 , China