1. Department of Dermatology; Peking Union Medical College Hospital; Chinese Academy of Medical Sciences and Peking Union Medical College; Beijing China
2. Department of Orthopedics Surgery; Peking Union Medical College Hospital; Chinese Academy of Medical Sciences and Peking Union Medical College; Beijing China
3. Department of Anaesthesia and Intensive Care; The Chinese University of Hong Kong; Hong Kong
4. State Key Laboratory of Digestive Disease and LKS Institute of Health Sciences; The Chinese University of Hong Kong; Hong Kong