Recent advances in obstetrics. Epidural analgesia in labour.
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D015360:Analgesia, Epidural / Q000009:adverse effects*; D016362:Analgesia, Obstetrical / Q000009:adverse effects*; D001416:Back Pain / Q000209:etiology*; D005260:Female; D006801:Humans; D011247:Pregnancy; D011644:Puerperal Disorders / Q000209:etiology*