Affiliation: | aDepartment of Family Medicine and Integrated Substance Abuse Programs, University of California-Los Angeles, Los Angeles, CA, USA bVA Greater Los Angeles Health Care System, Los Angeles, CA, USA cRTI International, San Francisco, CA, USA dDepartment of Family and Community Medicine, University of California-San Francisco, San Francisco, CA, USA eDivision of Infectious Diseases, Department of Internal Medicine, University of California-Davis, Sacramento, CA, USA fHealth Program and Drug Policy Research Center, RAND, Santa Monica, CA, USA gUrban Community Research Center, California State University, Dominguez Hills, CA, USA |