Affiliation: | 1. Department of Epidemiology and Biostatistics, School of Public Health, Xi'an Jiaotong University Health Science Center, Xi'an, China;2. Department of Health Professions, Hofstra University, Hempstead, New York;3. Department of Sexually Transmitted Disease Prevention and Control, Xi'an Centers for Disease Control and Prevention, Xi'an, China;4. Department 5. of 6. HIV 7. Testing 8. Mobilization, Xi'an Center for Marie Stopes International, Xi'an, China |