Department of Immunology and Pathogen Biology;
Xi 'an Jiaotong University College of Medicine;
Xi 'an 710061;
China;
Department of Dermatology;
the Second Affiliated Hospital;
Xi 'an Jiaotong University College of Medicine;
Xi "an 710004;
China;
Department of Epidemiology and Population Health;
London School of Hygiene and Tropical Medicine;
London WCIE 7HT;
UK;