W Yan1, Y H Zhou2, L Wang1, J Xiao3, W Li1. 1. Department of Dermatology and Venereology, West China Hospital, Sichuan University, Chengdu, Sichuan, China. 2. Department of Laboratory Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan, China. 3. Department of Critical Care Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan, China.