TY  - JOUR 
T1  - Balloon dilation for failed pyeloplasty in children?
JO  - International braz j urol
A1  - Duan, Haifeng
A1  - Zhu, Wei
A1  - Zhong, Wen
A1  - Li, Xiaohang
A1  - Zeng, Guohua
SN  - 1677-5538
UL  - 10.1590/S1677-5538.IBJU.2018.0407
VL  - 45 
Y1  - 2019
PB  - Brasil 
ER  -