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Ballard A, Parker-Autry C, Lin CP, Markland AD, Ellington DR, Richter HE.Ballard A, et al. Among authors: ellington dr.Int Urogynecol J. 2015 Jun;26(6):817-21. doi: 10.1007/s00192-015-2634-8. Epub 2015 Feb 12.Int Urogynecol J. 2015.PMID: 25672646Free PMC article.Clinical Trial.