“…Most of the included studies have a quasi-experimental design ( n = 13). Of these, four studies conducted a control group comparison (Gerstel et al, 2013; Hartvigsen et al, 2005; Pohjonen & Ranta, 2001; Rosswurm et al, 2003), while nine studies examined the effectiveness of the intervention using a single-group pre-post design (Andersen et al, 2015; Coogle et al, 2007; Czuba et al, 2012; Fallahpour et al, 2020; Jellema et al, 2002; Leff et al, 2000; Olson et al, 2015, 2018; Petterson et al, 2006). Three studies conducted randomized controlled trials (Bagheri et al, 2021; Horneij et al, 2001; Roelofs et al, 2007); in two studies, a cluster randomization was executed (Fujita et al, 2019; Fukui et al, 2019; Olson et al, 2016).…”