1. Department of Intensive Care Unit, Affiliated Hospital of Jining Medical University, Jining, Shandong 272000, P.R. China
2. Department of Foreign Languages, Jining Medical University, Jining, Shandong 272000, P.R. China
3. Department of Gastroenterology, Digestive Diseases Hospital of Shandong First Medical University, Shandong Institute of Parasitic Diseases, Shandong First Medical University and Shandong Academy of Medical Sciences, Jining, Shandong 272000, P.R. China
4. College of Clinical Medicine, Jining Medical University, Jining, Shandong 272000, P.R. China