1. Department of Family Medicine, University of California, Los Angeles, California.
2. Center for HIV Identification, Prevention, and Treatment Services (CHIPTS), University of California, Los Angeles, California.
3. Department of Community Health Sciences, Fielding School of Public Health, University of California, Los Angeles, California.
4. Department of Psychiatry and Biobehavioral Sciences, Semel Institute, University of California, Los Angeles, California.