“…Future studies could explore the independent effects of each component of SSPs, including the prescribed alternatives to the unregulated drug supply, the wrap-around, low barrier, and harm reduction-based delivery model, as well as OAT provision. However, there is ample evidence to support the benefit of delivering substance use services using low-barrier, flexible and wrap-around models [10][11][12], and it would behove all OAT programs to further incorporate these service delivery principles.…”