Received: 3 September 2019
Accepted: 11 November 2019
First Online: 15 November 2019
Ethics approval and consent to participate
: The study was approved by the institutional Ethics Committee of the Santa Maria alle Scotte University Hospital of Siena. In accordance with the Helsinki Declaration, patients provided written informed consent to participate to the study.
: Not applicable.
: The authors declare that they have no competing interests.