1. Dermatology Hospital of Southern Medical University, Guangzhou, China
2. Guangdong Center for Skin Diseases and Sexually Transmitted Infection Control, Guangzhou, China
3. University of North Carolina Project-China, Guangzhou, China
4. Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, United Kingdom
5. Central Clinical School, Monash University, Melbourne, Australia
6. Division of Epidemiology and Community Health, University of Minnesota Twin Cities, Minneapolis
7. Division of Community Health and Research, Eastern Virginia Medical School, Norfolk
8. Institute for Global Health and Infectious Diseases, School of Medicine, University of North Carolina at Chapel Hill