1. Department of Immunology and Pathogen Biology; Xi'an Jiaotong University College of Medicine; No. 76 Yanta West Road Xi'an 710061 Shaanxi China
2. Department of Dermatology; Second Affiliated Hospital of Xi'an Jiaotong University College of Medicine; No.157 Xiwu Road Xi'an 710004 Shaanxi China
3. Department of Epidemiology and Hygienic Statistics; Xi'an Jiaotong University College of Medicine; No. 76 Yanta West Road Xi'an 710061 Shaanxi China