1. Department of Immunology and Pathogen Biology; Xi'an Jiaotong University College of Medicine; Xi'an Shaanxi China
2. Department of Dermatology; Second Affiliated Hospital of Xi'an Jiaotong University College of Medicine; Xi'an Shaanxi China
3. Department of Epidemiology and Hygienic Statistics; Xi'an Jiaotong University College of Medicine; Xi'an Shaanxi China