1. Department of Hepatobiliary and Pancreatic Surgery and Retroperitoneal Tumor Surgery,The Affiliated Hospital of Qingdao University, No. 16,Jiangsu Road, Qingdao 266021, Shandong Province, China.
2. Department of Emergency Department, The Affiliated Hospital of Qingdao University, No. 16, Jiangsu Road, Qingdao 266021, Shandong Province, China.
3. Department of Otolaryngology, The Affiliated Hospital of Qingdao University, No. 16, Jiangsu Road, Qingdao 266021, Shandong Province, China.