- Correspondence to Dr Bulbul Aumakhan, HIV/AIDS and STI Surveillance and Research Department, National Center for Communicable Diseases, Ministry of Health, Ulaanbaatar 210648, Mongolia;
- Received November 25, 2013
- Revised March 4, 2014
- Accepted March 23, 2014
- First published April 10, 2014.
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