Received: 29 June 2020
Accepted: 3 March 2021
First Online: 16 March 2021
: This retrospective study was approved by the Ethical Committee of the National Cancer Institute “G. Pascale Foundation - IRCCS” of Naples and the requirement for patient informed consent was waived. All procedures performed in the study were in accordance with the ethical standards of the institutional and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: Each author give the consent for publication.
: The authors declare that they have no competing interests