title: Long-term effect of levodopa on progression of Parkinson's disease.
mesh_terms: D004185:Disability Evaluation; D005500:Follow-Up Studies; D006801:Humans; D007980:Levodopa / Q000627:therapeutic use*; D008134:Long-Term Care; D009048:Motor Skills / Q000187:drug effects; D010300:Parkinson Disease / Q000188:drug therapy*; D011597:Psychomotor Performance / Q000187:drug effects
chemical_list: D007980:Levodopa