title: Plasma levodopa and the "on-off" effect.
mesh_terms: D000368:Aged; D005260:Female; D006801:Humans; D007980:Levodopa / Q000009:adverse effects* / Q000097:blood; D009069:Movement Disorders / Q000097:blood / Q000139:chemically induced* / Q000209:etiology; D010300:Parkinson Disease / Q000097:blood / Q000188:drug therapy*; D013997:Time Factors
chemical_list: D007980:Levodopa