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Ghanem KG, Koumans EH, Johnson RE, Sawyer MK, Papp JR, Unger ER, Black CM, Markowitz LE.Ghanem KG, et al.J Pediatr Adolesc Gynecol. 2006 Feb;19(1):23-30. doi: 10.1016/j.jpag.2005.11.002.J Pediatr Adolesc Gynecol. 2006.PMID: 16472725