1. School of Clinical Medicine, Shandong Second Medical University, Weifang 261042, Shandong, China
2. Department of Gastroenterology, Weifang People’s Hospital, The First Affiliated Hospital of Shandong Second Medical University, Kuiwen, Weifang 261000, Shandong, China
3. Department of Health, Weifang People’s Hospital, The First Affiliated Hospital of Shandong Second Medical University, Kuiwen, Weifang 261000, Shandong, China