1. Section of Infectious Diseases, Department of Internal Medicine, AIDS Program, Yale School of Medicine, New Haven, Connecticut, USA (A. Di Paola, S. A. Springer); Department of Population Health, New York University Grossman School of Medicine, New York, New York, USA (D. Farabee); Center for Interdisciplinary Research on AIDS, Yale University School of Public Health, New Haven, Connecticut, USA (S. A. Springer)