“…(e) The original evaluation studies must have the following method characteristics: there must be at least one control or comparison group; the control group should be exposed to either no intervention or minimal treatment, and the control group must not include dropouts (people who had previously participated in the treatment program but later left it). Some systematic reviews which did not meet one or more of these criteria could not be included in this study (e.g., Adams, Leukefeld, & Peden, 2008;Bright & Martire, 2013;Egli, Pina, Skovbo Christensen, Aebi, & Killias, 2009;Ferri, Davoli, & Perucci, 2011;Fiestas & Ponce, 2012;Hedrich et al, 2011;Holloway, Bennett, & Farrington, 2005Koehler, Humphreys, Akoensi, Sanchez de Ribera, & Lösel, 2014;Larney, 2010;Mazerolle, Soole, & Rombouts, 2007;McMurran, 2006;Minozzi et al, 2011;Mitchell, Wilson, Eggers, & MacKenzie, 2012;Perry, 2006;Perry, Darwin, et al, 2009;Perry et al, 2013;Perry et al, 2015aPerry et al, , 2015bPerry, Newman, et al, 2009;Tripodi, Bledsoe, Kim, & Bender, 2011;Smedslund et al, 2011;Smith, Gates, & Foxcroft, 2006;Stallwitz & Stöver, 2007).…”