1. Department of Radiotherapy, Jiaozhou Central Hospital of Qingdao, Qingdao, Shandong, China
2. Health and Elderly Internal Medicine Department, Rehabilitation University Qingdao Hospital (Qingdao Municipal Hospital), Qingdao, Shandong, China
3. Department of Surgery II, Fourth Hospital of Hebei Medical University, Shijiazhuang, Hebei, China