International Brazilian Journal of Urology, Vol 43, Iss 2, Pp 311-316 International braz j urol v.43 n.2 2017 International Braz J Urol Sociedade Brasileira de Urologia (SBU) instacron:SBU International braz j urol, Volume: 43, Issue: 2, Pages: 311-316, Published: APR 2017 International Brazilian Journal of Urology : official journal of the Brazilian Society of Urology