Affiliation: | 1. Department of Gastroenterology, The First Affiliated Hospital, College of Medicine, Zhejiang University, , Hangzhou, 310003 China;2. Department of Gastroenterology, The Affiliated Hospital, College of Medicine, Ningbo University, , Ningbo, 315020 China;3. Hangzhou Zhiyuan Medical Inspection Institute, , Hangzhou, 310021 China |