title: Survey of 500 callers to a national cocaine helpline.
mesh_terms: D000328:Adult; D003042:Cocaine / Q000008:administration & dosage; D005260:Female; D006266:Health Education / Q000379:methods; D006801:Humans; D008297:Male; D008875:Middle Aged; D019966:Substance-Related Disorders / Q000523:psychology*; D013689:Telephone
chemical_list: D003042:Cocaine