1. NYU Grossman School of Medicine, New York, NY, USA
2. Graduate School of Public Health and Health Policy, City University of New York, New York, NY, USA
3. Medical School, University of Cyprus, Nicosia, Cyprus
4. Intercambios Civil Association and University of Buenos Aires, Buenos Aires, Argentina
5. Mount Sinai Beth Israel and Center for Drug Use and HIV Research, New York, NY, USA