University of North Carolina Project-China, National University of Singapore (NUS) - Saw Swee Hock School of Public Health, University of North Carolina Project-China, University of North Carolina Project-China, University of North Carolina Project-China, University of North Carolina (UNC) at Chapel Hill, University of North Carolina (UNC) at Chapel Hill - Institute for Global Health and Infectious Diseases, Cincinnati Children's Hospital Medical Center, Nanjing Medical University, Johns Hopkins University, University of North Carolina (UNC) at Chapel Hill, Washington University in St. Louis - Department of Internal Medicine, Yale University, University of California, Los Angeles (UCLA), Emory University, Southern Medical University - Dermatology Hospital of Southern Medical University, University of North Carolina (UNC) at Chapel Hill, Southern Medical University - Dermatology Hospital of Southern Medical University, Dongguan Sixth Hospital, The People’s Hospital of Wuchuan, Huidong Chronic Disease Station, Dermatology Hospital of Jiangmen, The No 1 People’s Hospital of Foshan, Zhuhai Doumen District Qiaoli Traditional Chinese Medicine Hospital, Zhanjiang Chronic Diseases Institute, Foshan Friend’s Care Center For AIDS Control, Zhuhai Xutong Voluntary Services Center, Dermatology Hospital of Southern Medical University, Chinese Academy of Medical Sciences & Peking Union Medical College (CAMS & PUMC) - Institute of Dermatology, Southern Medical University - Dermatology Hospital, Southern Medical University - Dermatology Hospital of Southern Medical University, Dermatology Hospital of Southern Medical University and Southern Medical University