Massachusetts Medical Society, New England Journal of Medicine, 5(357), p. 499-501, 2007
DOI: 10.1056/nejme078097
Lippincott, Williams & Wilkins, Obstetric Anesthesia Digest, 1(28), p. 8-9, 2008
DOI: 10.1097/01.aoa.0000308287.22672.6d
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