title: Symposium on stereotaxic operations in extrapyramidal disturbances organized by the Netherlands Society of Neurosurgeons held in Groningen (The Netherlands), 15 November, 1969. Introduction.
mesh_terms: D001479:Basal Ganglia / Q000601:surgery*; D004295:Dihydroxyphenylalanine / Q000627:therapeutic use; D010300:Parkinson Disease / Q000188:drug therapy / Q000601:surgery*; D013238:Stereotaxic Techniques
chemical_list: D004295:Dihydroxyphenylalanine