“…At this stage, 101 articles were excluded for not meeting inclusion criteria, and the full-text versions of 65 articles were pulled for further screening. Of these, 3 articles met the criteria for inclusion in this review as a primary article (Moatti et al, 2003;Bateganya et al, 2005;Bunnell et al, 2006), and 59 were included as background articles (Mussico et al, 1994;Kelly et al, 1998a;Kelly et al, 1998b;Remien et al, 1998;van der Straten, 1998;DeNoon, 1999;Misovich et al, 1999;Colebunders et al, 2000;Erbelding et al, 2000;Miller et al, 2000;Vanable et al, 2000;van der Straten et al, 2000;Wood et al, 2000;Catz et al, 2001;Dukers et al, 2001;Vlahov et al, 2001;Bouhnik et al, 2002;Chen et al, 2002;Crepaz et al, 2002;Demmer, 2002;DiClemente et al, 2002;Hosseinipour et al, 2002;Katz et al, 2002;Laporte, 2002;Nollen et al, 2002;Ostrow et al, 2002;Gray et al, 2003; International Collaboration on HIV Optimism, 2003;Rietmeijer et al, 2003;Rothenberg et al, 2003;Stephenson et al, 2003;Xiridou et al, 2003;Boily et al, 2004;Crepaz et al, 2004;Fang et al, 2004;…”