title: Underdosing the epidural invalidates a good clinical trial.
mesh_terms: D015360:Analgesia, Epidural; D000779:Anesthetics, Local / Q000008:administration & dosage*; D001014:Aortic Aneurysm / Q000601:surgery; D002045:Bupivacaine / Q000008:administration & dosage; D006801:Humans; D016032:Randomized Controlled Trials as Topic
chemical_list: D000779:Anesthetics, Local; D002045:Bupivacaine