Received: 21 April 2019
Accepted: 24 April 2020
First Online: 27 May 2020
Ethics approval and consent to participate
: The study was approved by the ethical committee of the Urology Department, Faculty of Medicine, Cairo University (I-131016, on the 26th of December 2016). The procedures and follow-up were explained to every participant and an informed written consent was obtained from all participants.
: Not applicable.
: The authors declare that they have no competing interests.