1. Division of AIDS and STIs, Department of Disease Control, Ministry of Public Health, Nonthaburi, Thailand
2. Division of HIV Prevention, Centers for Disease Control and Prevention, Atlanta, GA, USA
3. Thailand Ministry of Public Health – U.S. Centers for Disease Control and Prevention Collaboration, Nonthaburi, Thailand
4. Office of Disease Prevention and Control 3. Department of Disease Control, Ministry of Public Health, Nonthaburi, Thailand