Funding for this research was provided by:
Received: 3 September 2020
Accepted: 27 January 2021
First Online: 12 February 2021
Ethics approval and consent to participate
: The study protocol was reviewed and approved by Pisa University Hospital Ethics Committee (approval number 363/2014) and written informed consent was provided by each patient.
: Not applicable.
: The authors declare that they have no competing interests.