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Zderic SA, Sillen U, Liu GH, Snyder H 3rd, Duckett JW, Wein AJ, Levin RM.Zderic SA, et al.J Urol. 1993 Aug;150(2 Pt 2):623-5. doi: 10.1016/s0022-5347(17)35564-7.J Urol. 1993.PMID: 8326608Free article.