1. Department of Dermatology, The Second Affiliated Hospital of Kunming Medical University, Kunming, Yunnan 650101, P.R. China
2. Department of Clinical Laboratory, The First Affiliated Hospital of Kunming Medical University, Kunming, Yunnan 650031, P.R. China
3. Basic Nursing Teaching Department of Kunming Medical University, Kunming, Yunnan 650500, P.R. China