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Gershenson DM, Tortolero-Luna G, Malpica A, Baker VV, Whittaker L, Johnson E, Follen Mitchell M.Gershenson DM, et al.Obstet Gynecol Clin North Am. 1996 Jun;23(2):475-543.Obstet Gynecol Clin North Am. 1996.PMID: 8784888Review.