“…A total of 15 studies (Table 1) met the inclusion criteria and of these studies 11 were conducted in the UK (Dyson, Meagher, and Robson 2002;Ward et al 2003;Howlin et al 2004;Aston et al 2005;Caton and Kagan 2007;Beyer and Kaehne 2008;Durkin et al 2009;Palikara, Lindsay, and Dockrell 2009;Whitehouse et al 2009;O'Riordan 2011;, 2 in Sweden (Engström, Engström, and Emilsson 2003;Billstedt, Gillberg, and Gillberg 2011), 1 in Norway (Mykleburst and Båtevik 2009) and 1 in Belgium (Renty and Roeyers 2006). Just over half of the studies (N ¼ 8/15) were published in the last four years of the period 2002-2012.…”