Affiliation: | 1.Division of Global Public Health, UCSD School of Medicine,University of California, San Diego,La Jolla,USA;2.Patronato Pro-COMUSIDA, A.C.,Tijuana,Mexico;3.School of Social Work,University of Southern California,Los Angeles,USA;4.Centro Nacional para la Prevención y Control del VIH/SIDA e ITS,Mexico City,Mexico |