1. Department of Dermatology, First Affiliated Hospital of Kunming Medical University Kunming 650032 China
2. Dermatology Service Veterans Affairs Medical Center San Francisco CA 94121 USA
3. Department of Dermatology University of California San Francisco CA 94121 USA
4. Qujing Affiliated Hospital of Kunming Medical University Qujing 655000 China
5. Department of Dermatology The First People's Hospital of Qujing Qujing 655000 China
6. Department of Dermatology People's Hospital of Chuxiong Yi Autonomous Prefecture Chuxiong675000 China