TY  - JOUR 
T1  - Investigative urology
JO  - International braz j urol
A1  - Sampaio, Francisco J.B.
SN  - 1677-5538
UL  - 10.1590/S1677-55382004000400019
VL  - 30 
Y1  - 2004
PB  - Brasil 
ER  -