Received: 28 April 2020
Accepted: 29 October 2020
First Online: 7 November 2020
Ethics approval and consent to participate
: All procedures performed in this study were in accordance with the 1964 Helsinki declaration and its later amendments. Ethical approval was obtained from the local ethics committee (Independent Ethics Committee, A.O.U. Cagliari). Written informed consent was obtained from all patients included in this study.
: Not applicable.
: Pietro Giorgio Calò is a member of the editorial board of this journal. The authors declare that they have no competing interests.