Received: 5 November 2020
Accepted: 10 February 2021
First Online: 1 March 2021
Ethics approval and consent to participate
: The study was approved by the Ethical Committee of the Fondazione Policlinico Gemelli (Approval Number: 3146). All patients or next of kin provided a verbal informed consent because of isolation precautions according to local protocol approved by hospital authorities.
: Not applicable.
: The authors declare that they have no competing interest.