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 Medicine and Therapeutics; The Chinese University of Hong Kong; Hong Kong China
4. Li Ka Shing Institute of Health Sciences; The Chinese University of Hong Kong; Hong Kong China
5. Department of Anaesthesia and Intensive Care and State Key Laboratory of Digestive Diseases; The Chinese University of Hong Kong; Hong Kong China