Friedmann PD, Ducharme LJ, Welsh W, Frisman L, Knight K, Kinlock T, Mitchell SG, Hall E, Urbine T, Gordon M, Abdel-Salam S, O'Connell D, Albizu-Garcia C, Knudsen H, Duval J, Fenster J. A cluster randomized trial of an organizational linkage intervention for offenders with substance use disorders: study protocol. Health Justice. 2013 Dec 19; 1(6).