“…Our initial search identified a total of 251 potentially eligible articles. Based on our inclusion criteria, a total of 14 studies were involved in this meta-analysis (Chakravorty et al, 2006;Chang et al, 2008;Erzin et al, 2008;Furuta et al, 2002;García-González et al, 2003;Garcia-Gonzalez et al, 2005;Hsu et al, 2004;Kim et al, 2006;Li et al, 2007;Mei et al, 2010;Melo Barbosa et al, 2009;Queiroz et al, 2005;Shin et al, 2008;Sugimoto et al, 2007). There was perfect inter-rater reliability for the selection of studies to be included in the meta-analysis, with Kappa values of 0.89 based on titles and abstracts and 0.92 based on full texts.…”