1. Department of Medicine, Albert Einstein College of Medicine and Montefiore Medical Center, Bronx, NY, USA
2. HIV Epidemiology and Field Services Program, New York City Department of Health and Mental Hygiene, New York, NY, USA
3. Adolescent AIDS Program, Montefiore Medical Center and Albert Einstein College of Medicine, Bronx, NY, USA
4. Department of Emergency Medicine, Albert Einstein College of Medicine and Montefiore Medical Center, Bronx, NY, USA