1. National Center for STD Control, Chinese Academy of Medical Sciences (CAMS) and Peking Union Medical College (PUMC) Institute of Dermatology, 12 Jiangwangmiao Street, Nanjing 20042, China
2. UNICEF/UNDP/World Bank/WHO Special Programme for Research & Training in Tropical Diseases (TDR), World Health Organization, 20 Avenue Appia, CH-1211 Geneva 27, Switzerland
3. London School of Hygiene and Tropical Medicine, Keppel Street, London, United Kingdom