Dennis BB, Bowles J, Johnson C, De Wolfe T, Mundel E, Fast D, Boyd J, Fleury M, Bach P, Fairbairn N, Socías ME, Ti L, Hayashi K, DeBeck K, Milloy MJ, Felicella G, Morgan J, Eekhoudt CR, McGrail K, Richardson L, Ryan A, Mbuagbaw L, Guyatt G, Nolan S Road to Recovery: protocol for a mixed-methods prospective cohort study evaluating the impact of a new model of substance use care in a Canadian setting BMJ Open PubMed