“…represented 2848 children and young people ranging from 18 to 433 per study; an inclusion of 25 to 99% of those eligible to participate (eligibility to participate was not reported in eight studies Horan et al, 1990;Joshi et al, 2009;Mosnaim et al, 2008;Mulvaney et al, 2010;Shegog et al, 2001;Yoon & Godwin, 2007). A sample size calculation was only made in 12 (44%) studies Franklin et al, 2006;Guendelman et al, 2002;Iafusco et al, 2011;Jan et al, 2007;Jones et al, 2010;Krishna et al, 2003;McPherson et al, 2006;Mosnaim et al, 2008;Palermo et al, 2009;Shegog et al, 2001;Zorc et al, 2009).…”