“…After selecting studies according to the inclusion criteria, 47 articles considered for further review. Six of these 47 articles could not provide outcome information ( Brosseau et al, 1993 ; Guimond et al, 2014 ; Lauer, 2006 ; Nortvedt, Riise & Maeland, 2005 ; Senecal-Quevillon, Duquette & Richer, 1986 ; Turner et al, 2007 ). We could not obtain the full article for 5 of the 47 articles ( Dobosz, Tyrpien & Pierzchala, 2012 ; Frutos Alegria et al, 2002a ; Frutos Alegria et al, 2002b ; Ragonese et al, 2007 ; Rodriguez Regal et al, 2009 ).…”