Coviello DM, Cornish JW, Lynch KG, Boney TY, Clark CA, Lee JD, Friedmann PD, Nunes EV, Kinlock TW, Gordon MS, Schwartz RP, Nuwayser ES, O'Brien CP. A multisite pilot study of extended-release injectable naltrexone treatment for previously opioid-dependent parolees and probationers. Subst Abus. 2012; 33(1):48-59.