“…We classified studies according to their research focus (Table 3). Two-thirds (n = 18) of the studies focused on treatment accessibility or acceptability from the perspective of clients (n = 6), staff (n = 8) or both (n = 4) [30,31,55,57,65,76]; [54,56,58,60,68,70,71,77]; [63,64,66,74]. The remaining one-third focused on treatment effectiveness (n = 4) [24,69,73,75]; effectiveness-implementation (n = 3) [29,62,72] or implementation research (n = 3) [59,61,67].…”