1. Department of Burns and Plastic Surgery, West China Hospital, Sichuan University, Chengdu, P. R. China
2. Department of Anesthesiology, Chengdu Women and Children’s Central Hospital, P. R. China
3. West China School of Medicine, Sichuan University, Chengdu, P. R. China
4. Department of Radiology, West China Hospital, Sichuan University, Chengdu, P. R. China