Proceedings: A clinical trial of four anaesthetics for obstetric epidural analgesia.
D000767:Anesthesia, Epidural; D000773:Anesthesia, Obstetrical; D002045:Bupivacaine; D005260:Female; D006801:Humans; D008012:Lidocaine; D011247:Pregnancy
D008012:Lidocaine; D002045:Bupivacaine