1. Department of Gastroenterology, Shenzhen People's Hospital (The Second Clinical Medical College, Jinan University, The First Affiliated Hospital, Southern University of Science and Technology), Shenzhen, Guangdong Province, China
2. Wuxi School of Medicine, Jiangnan University, Wuxi, Jiangsu Province, China
3. Department of Gastroenterology, Qilu Hospital, Shandong University, Shandong Province, China.