title: Long-term levodopa in Parkinson's disease.
mesh_terms: D004305:Dose-Response Relationship, Drug; D006801:Humans; D007980:Levodopa / Q000008:administration & dosage* / Q000627:therapeutic use; D010300:Parkinson Disease / Q000188:drug therapy*; D013997:Time Factors
chemical_list: D007980:Levodopa