Antecedents and correlates of methadone treatment entry: a comparison of out-of-treatment and in-treatment cohorts

Schwartz RP, Kelly SM, O’Grady KE, Mitchell SG, Brown BS (2011). Antecedents and correlates of methadone treatment entry: a comparison of out-of-treatment and in-treatment cohorts. Drug and Alcohol Dependence. 115 (1-2), 23-29. [PMCID: PMC3059350].