1. Fayoum University Faculty of Medicine, 158405, UROLOGY, Fayoum Government, Fayoum, Egypt, 63514,
2. Egypt;
3. Cairo University Kasr Alainy Faculty of Medicine, 63527, Urology, Cairo, Egypt, ;
4. Fayoum University Faculty of Medicine, 158405, Urology, Fayoum, Egypt, ;
5. Suez Canal University, 68831, Urology, Ismailia, Egypt, ;
6. Cairo University Kasr Alainy Faculty of Medicine, 63527, Cairo, Egypt, ;