“…The needs of patients with a dual diagnosis are complex and delivering effective care calls for specialized knowledge, novel approaches, and clinical skills specific to this population (EMCDDA, 2015;McCallum, Mikocka-Walus, Gaughwin, Andrews, & Turnbull, 2016;McGovern, Lambert-Harris, Gotham, Claus, & Xie, 2014;Petrakis et al, 2018). Acquiring and developing these competencies requires further staff education, standardized training, and professional support (Antai-Otong et al, 2016;Delaney & Lynch, 2008;McGovern et al, 2014;Petrakis et al, 2018;Van Boekel, Brouwers, Van Weeghel, & Garretsen, 2013). Many also argue in favor of an integrated care model, in which the management of substance use is incorporated as an integral part of mental health services.…”