title: Intrathecal or extradural: which approach for surgery?
mesh_terms: D000767:Anesthesia, Epidural; D000775:Anesthesia, Spinal; D000779:Anesthetics, Local / Q000008:administration & dosage; D006801:Humans; D013514:Surgical Procedures, Operative
chemical_list: D000779:Anesthetics, Local