1. Department of Human Development and Family Sciences, University of Connecticut, Storrs, Connecticut, USA
2. College of Nursing, Infectious Disease Institute, The Ohio State University, Columbus, Ohio, USA
3. Department of Psychiatry and Human Behavior, Warren Alpert Medical School of Brown University, Providence, Rhode Island, USA
4. Program in Addiction Medicine, Yale School of Medicine and Center for Interdisciplinary Research on AIDS, Yale School of Public Health, New Haven, Connecticut, USA
5. Department of Medicine, Brown University, Providence, Rhode Island, USA