1. Department of Orthopaedic Surgery, Peking Union Medical College Hospital; Chinese Academy of Medical Sciences and Peking Union Medical College; Beijing China
2. Department of Orthopedic Surgery, Beijing Jishuitan Hospital, Fourth Clinical College of Peking University; Jishuitan Orthopaedic College of Tsinghua University; Beijing China
3. Department of Anaesthesia and Intensive Care; The Chinese University of Hong Kong; Hong Kong Hong Kong Special Administrative Region Hong Kong
4. State Key Laboratory of Digestive Diseases, LKS Institute of Health Sciences; The Chinese University of Hong Kong; Hong Kong Hong Kong Special Administrative Region Hong Kong