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Geifman-Holtzman O, Wojtowycz M, Kosmas E, Artal R.Geifman-Holtzman O, et al.Obstet Gynecol. 1997 Feb;89(2):272-5. doi: 10.1016/S0029-7844(96)00434-6.Obstet Gynecol. 1997.PMID: 9015034Review.