1. Department of Infectious Disease, People’s Hosptial of Rizhao, Affiliated Clinical Hospital of Jining Medical Univerity, Jining Medical University, Rizhao, Shandong, China (mainland)
2. Department of Digestive Disease, People’s Hosptial of Rizhao, Affiliated Clinical Hospital of Jining Medical Univerity, Jining Medical University, Rizhao, Shandong, China (mainland)
3. Department of General Surgery, Qilu Hospital of Shandong University, Jinan, Shandong, China (mainland)