Received: 5 September 2018
Accepted: 1 May 2019
First Online: 15 May 2019
Ethics approval and consent to participate
: This study protocol was reviewed and approved by the ethic committee of French Association of Urology (ref: 2018/010) and obtaining additional informed consent from patients was not required by the ethic committee for this retrospective study.
: Not applicable.
: The authors declare that they have no competing interests.
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