“…Studies compared i-CBT with a waitlist control group, treatment as usual (TAU) or minimal attention control group (k = 8), and with an i-non-CBT psychological intervention (k = 2). Studies were conducted in five countries: Australia (k = 1) (Spence et al, 2011); Iraq (k = 1) (Knaevelsrud, Brand, Lange, Ruwaard, & Wagner, 2015); Sweden (k = 1) (Ivarsson et al, 2014); UK (k = 1) (Lewis et al, 2017); and USA (k = 6) (Engel et al, 2015;Krupnick et al, 2017;Kuhn et al, 2017;Littleton, Grills, Kline, Schoemann, & Dodd, 2016, Litz et al, 2007Miner et al, 2016). Three studies recruited in clinical settings via clinician referrals (Engel et al, 2015;Krupnick et al, 2017;Lewis et al, 2017), these studies also recruited via media, website and promotional material advertising, which was the method used by the remaining seven studies.…”