1. Department of Infectious Diseases, Tehran University of Medical Sciences, Tehran, Iran
2. Department of Pathology, Razi Hospital and Cancer Institute, Imam Khomeini Hospital Complex, Tehran University of Medical Sciences, Iran
3. Iranian Research Center for HIV/AIDS, Iranian Institute for Reduction of High-Risk Behaviors, Tehran University of Medical Sciences, Tehran, Iran
4. Department of Pathology, Imam Khomeini Hospital Complex, Tehran University of Medical Sciences, Tehran, Iran