1. Department of Epidemiology, School of Global Public Health, New York University, New York, NY 10003, USA
2. Center for Drug Use and HIV/HCV Research, New York, NY 10003, USA
3. Public Health Department, NORC at the University of Chicago, Chicago, IL 60603, USA
4. Department of Population and Public Health Sciences, Keck School of Medicine, University of Southern California, Los Angeles, CA 90033, USA
5. Department of Medicine, University of Chicago, Chicago, IL 60637, USA
6. Southern Public Health and Criminal Justice Research Center, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA