1. Xijing Hospital, Fourth Military Medical University; Burns Centre of PLA, Department of Burns and Cutaneous Surgery; 169, Changle West Road Xi'an Shanxi Province China
2. The Chinese University of Hong Kong; Division of Epidemiology, The Jockey Club School of Public Health and Primary Care; Hong Kong SAR China
3. Third Military Medical University; Department of Dermatology and Venereology, Xinqiao Hospital; 122, Gaotangyan Street, Shapingba Chongqing China 710032