Received: 21 May 2019
Accepted: 5 November 2019
First Online: 21 November 2019
Ethics approval and consent to participate
: All investigations involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards. The study received authorization for publication by the Regional Ethics Committee of Liguria (R.P. 011–2019).
: No individual details, images, or videos are reported within the manuscript.
: The authors declare that they have no competing interests.