Received: 30 December 2019
Accepted: 9 November 2020
First Online: 18 March 2021
Ethics approval and consent to participate
: The study was conducted in accordance with the principles of the Declaration of Helsinki and was approved by local ethical review boards. The protocol was compliant with ethical standards and privacy rule requirements for research and approved by the local ethics committee (Comitato Etico Regione Liguria based at the IRCCS San Martino of Genoa; resolution number 039REG2016). Written informed consent was obtained from all participants.
: Not applicable.
: The authors declare that they have no competing interests.