Received: 4 February 2019
Accepted: 2 July 2019
First Online: 7 August 2019
Ethics approval and consent to participate
: Written informed consent to the anonymous use of their clinical and instrumental data for scientific purposes is signed by all the patients treated at our Institution.No ethical approval was required since this was a retrospective study on data from past clinical records.
: Not applicable
: The authors declare that they have no competing interests.