Received: 17 February 2020
Accepted: 4 November 2020
First Online: 11 November 2020
Ethics approval and consent to participate
: all subjects were fully informed about experimental protocols in which the investigations were carried out following the guidelines of the Declaration of Helsinki of 1975 (ExternalRef removed), revised in Tokyo 2004 and subsequently in 2013. All participants approved and signed an informed consent document, authorizing the experimenter to use the results for scientific publication purposes, before enrolling in the study. The Institutional Review Board of the University of Pavia (Italy) approved the study.
: Not applicable.
: The Authors declare that they have no competing interests.