Received: 31 October 2019
Accepted: 5 December 2019
First Online: 30 December 2019
Ethics approval and consent to participate
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards; informed consent to participate was obtained from all individual patients included in the study. The institutional ethic committee approved the retrospective data analysis and study pubblication.
: Written informed consent for publication was obtained from all individual patients included in the study.
: The authors declare that they have no competing interests.