1. Department of Urology, Faculty of Medicine, Kafrelsheikh University, Kafrelsheikh, Egypt
2. Glasgow Urological Research Unit, Department of Urology, Queen Elizabeth University Hospital, Glasgow, UK
3. Dentistry and Nursing, School of Medicine, University of Glasgow, Glasgow, UK
4. Department of Urology, Damanhour International Medical Institute, Beheira, Egypt
5. Department of Urology, Urology and Nephrology Centre, Mansoura University, Mansoura, Egypt