Combined Buprenorphine and Behavioral Treatment With and Without Contingent Reinforcement on Opioid and Cocaine Abstinence. - 22 [clinicaltrials:NCT00000240]

Combined Buprenorphine and Behavioral Treatment With and Without Contingent Reinforcement on Opioid and Cocaine Abstinence. - 22 [clinicaltrials:NCT00000240]