1. College of Biomass Science and Engineering, Sichuan University, Chengdu 610065, P. R. China
2. Sichuan Univ, West China Sch Basic Med Sci & Forens Med, Chengdu 610041, P. R. China
3. Department of Plastic and Burn Surgery, West China School of Medicine, West China Hospital, Sichuan University, Chengdu, 610041, P. R. China