1. Department of Gastroenterology, The Affliated Huaian No.1 People’s Hospital, Nanjing Medical University, Huai’an, China
2. Department of Gastroenterology, West China Hospital, Sichuan University, Chengdu, China
3. The Comprehensive Cancer Centre, Department of Central Laboratory, The Affliated Huaian No.1 People’s Hospital, Nanjing Medical University, Huai’an, China