title: Intravenous cocaine self-administration by human volunteers: second-order schedules of reinforcement.
mesh_terms: D000328:Adult; D003042:Cocaine / Q000008:administration & dosage*; D004305:Dose-Response Relationship, Drug; D006801:Humans; D007262:Infusions, Intravenous; D008297:Male; D008875:Middle Aged; D012055:Reinforcement Schedule; D012646:Self Administration; D011795:Surveys and Questionnaires
chemical_list: D003042:Cocaine