Randomized trial of epidural versus intravenous analgesia during labor.
Lee
J S
JS
Singh
P
P
D015360:Analgesia, Epidural; D016362:Analgesia, Obstetrical; D005260:Female; D006801:Humans; D011247:Pregnancy; D016032:Randomized Controlled Trials as Topic; D012107:Research Design; D012306:Risk