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Markham SM, Carpenter SE, Rock JA.Markham SM, et al.Obstet Gynecol Clin North Am. 1989 Mar;16(1):193-219.Obstet Gynecol Clin North Am. 1989.PMID: 2664618Review.
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Markham SM, Welling DR, Larsen KS, Snell MJ.Markham SM, et al.N Y State J Med. 1991 Feb;91(2):69-71.N Y State J Med. 1991.PMID: 1900926No abstract available.