Affiliation: | 1. Department of Gastroenterology, Qilu Hospital of Shandong University, Jinan, P.R. China;2. School of Medicine and Life Sciences, University of Jinan, Shandong Academy of Medical Sciences, Jinan, P.R. China;3. Shandong Cancer Hospital and Institute, Jinan, P.R. China;4. Department of General Surgery, Qilu Hospital of Shandong University, Jinan, P.R. China |