Crawford E D, Kozlowski J M, Debruyne F M, Fair W R, Logothetis C J, Balmer C, Robinson R G, Porter A T, Kirk D
Division of Urology, University of Colorado Health Sciences Center, Denver.
Urology. 1994 Oct;44(4):481-5. doi: 10.1016/s0090-4295(94)80043-x.