Lippincott, Williams & Wilkins, Obstetrical & Gynecological Survey, 4(65), p. 246-247, 2010
DOI: 10.1097/01.ogx.0000371722.64629.85
Elsevier, Year Book of Medicine, (2010), p. 138-142
DOI: 10.1016/s0084-3873(10)79936-3
American Medical Association, Journal of the American Medical Association, 14(302), p. 1551
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