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Raina R, Lakin MM, Agarwal A, Mascha E, Montague DK, Klein E, Zippe CD.Raina R, et al. Among authors: zippe cd.Urology. 2004 May;63(5):960-6. doi: 10.1016/j.urology.2003.12.012.Urology. 2004.PMID: 15134989
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Raina R, Agarwal A, Allamaneni SS, Lakin MM, Zippe CD.Raina R, et al. Among authors: zippe cd.Urology. 2005 Feb;65(2):360-4. doi: 10.1016/j.urology.2004.09.013.Urology. 2005.PMID: 15708053Clinical Trial.