Search Results Use the search box below to revise your search, or start a new search. Studies (3) Variables Publications Your query returned 3 studies. Sort by: Study Relevance Title A-Z Released/Updated Time Period Most Cited in ICPSR Bib. Variable Relevance 1. Latino MSM Community Involvement: HIV Protective Effects (ICPSR 34385) Ramirez-Valles, Jesus 2. National Longitudinal Study of Adolescent to Adult Health (Add Health), 1994-2008 [Public Use] (ICPSR 21600) Harris, Kathleen Mullan; Udry, J. Richard 3. Monitoring the Future: A Continuing Study of American Youth (12th-Grade Survey), 2006 (ICPSR 20022) Johnston, Lloyd D.; Bachman, Jerald G.; O'Malley, Patrick M.; et al.