“…One study only recruited individuals that had "failed to respond to the standard course of treatment" [46]. [40,42,43,45,68,71,73,76,77,88,92,95,97], alcohol use [42, 43, 58, 80-83, 88, 92, 95, 104], adherence to OAT [42,43,49,53,54,61,72,86,102,110], HIV/HCV risk behavior [54,57,60,61,67,88,89,91,105], withdrawal symptoms [40,49,65,73,86,87,96], adverse events [49,58,75,102], measure of craving [49,83], relapse prevention [41,106], drop-outs from...…”