International braz j urol, Volume: 43, Issue: 1, Pages: 13-19, Published: FEB 2017 International braz j urol v.43 n.1 2017 International Braz J Urol Sociedade Brasileira de Urologia (SBU) instacron:SBU International Brazilian Journal of Urology, Vol 43, Iss 1, Pp 13-19 International Brazilian Journal of Urology : official journal of the Brazilian Society of Urology