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Epstein JI, Pizov G, Steinberg GD, Carter HB, Pitcock R, Armas OA, Partin A, Walsh PC.Epstein JI, et al.J Urol. 1992 Jul;148(1):87-91. doi: 10.1016/s0022-5347(17)36518-7.J Urol. 1992.PMID: 1613888Free article.Review.