1. Dalian Skin Disease Hospital; Dalian Liaoning China
2. Department of Dermatology; The 7th People's Hospital of Shenyang City; Shenyang Liaoning China
3. Department of Dermatology; The 2nd Affiliated Hospital of Xi'an Jiaotong University; Xi'an Shaanxi China
4. Dermatology Services; Veterans Affair Medical Center and University of California; San Francisco CA USA