1. Department of Gastroenterology, Qilu Hospital of Shandong University, Jinan, Shandong 250012, P.R. China
2. Department of Endoscopy Center, Tai'an Central Hospital, Tai'an, Shandong 271000, P.R. China
3. Department of Critical Care Medicine, Tai'an Central Hospital, Tai'an, Shandong 271000, P.R. China
4. Department of Central Laboratory, Tai'an Central Hospital, Tai'an, Shandong 271000, P.R. China
5. Department of Endocrinology, Tai'an Central Hospital, Tai'an, Shandong 271000, P.R. China
6. Department of Gastroenterology, Tai'an Central Hospital, Tai'an, Shandong 271000, P.R. China