Received: 13 January 2021
Accepted: 13 May 2021
First Online: 26 May 2021
: The study was approved by the institutional review board (Ethics Committee IRST IRCCS-AVR, 2207/2012) and conducted in accordance with the Declaration of Helsinki. Patients have signed informed consent before analysis.
: Not applicable.
: The authors declare that they have no competing interests.