Article History
Received: 20 April 2020
Accepted: 10 August 2020
First Online: 15 October 2020
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the Italian ethical guidelines for retrospective studies and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.
: Informed consent was obtained from all individual participants prior to treatment.