“…Five studies were from UK settings (Cormack et al, 2000;Emerson, 2003;Gobrial and Raghavan, 2012;Hassiotis and Turk, 2012;Reid et al, 2011), nine from European settings (Dekker et al, 2002a;Dworschak et al, 2016;Gillberg et al, 1986;Kaptein et al, 2008;Koskentausta et al, 2004;Rackauskaite et al, 2016;Soltau et al, 2015;Stromme and Diseth, 2000;Taanila et al, 2003) and five from other countries (Costenbader and Keller, 1990;Einfeld and Tonge, 1996;Emerson et al, 2010;Gothelf et al, 2008;Molteno et al, 2001). Eleven studies were based on parent-reported data (Cormack et al, 2000;Dekker et al, 2002a;Einfeld and Tonge, 1996;Emerson, 2003;Emerson et al, 2010;Hassiotis and Turk, 2012;Kaptein et al, 2008;Koskentausta et al, 2004;Molteno et al, 2001;Rackauskaite et al, 2016;Taanila et al, 2003), two on teacher-reported data (Dworschak et al, 2016;Soltau et al, 2015) and two studies provided both parent-and teacher-reported data (Costenbader and Keller, 1990;Gobrial and Raghavan, 2012). The DBC and CBCL were the two most commonly used symptom rating scales: six studies used the DBC (Cormack et al, 2000;Dworschak et al, 2016;…”