“…55.6%) provide information about response/refusal rate in regard to caregivers of mentally-ill children (Foldemo et al ., 2005; Xiang et al ., 2009; Yamada et al ., 2012; Ji et al ., 2014; Kuhlthau et al ., 2014). Among studies that assessed a control group, one provided information about response/refusal rate for both groups (Mugno et al ., 2007), seven only for caregivers of mentally-ill children (Allik et al ., 2006; Lee et al ., 2009; Schreyer and Hampel, 2009; Benjak et al ., 2011; Ginieri-Coccossis et al ., 2012; Anastasiadou et al ., 2016; Jalenques et al ., 2017) and nine for neither group (Lange et al ., 2005; Egemen et al ., 2008; Naitoh et al ., 2012; Hadi et al ., 2013; Kandemir et al ., 2014; Kilicoglu et al ., 2014; Avrech Bar et al ., 2015; Suzumura, 2015; Zare et al ., 2017). Caregivers of mentally-ill children were mostly recruited via (psychiatric) outpatient clinics or other centers specialised on the child's diagnosis.…”