Predictors of patient retention in methadone maintenance treatment
Psychology of Addictive Behaviors (2015) - Comment
pubmed: 26098127  doi: 10.1037/adb0000090  issn: 1939-1501  issn: 0893-164x 

Steven L. Proctor, Amy L. Copeland, Albert M. Kopak, Norman G. Hoffmann, Philip L. Herschman, Nadiya Polukhina