Text and Data Mining valid from 2018-07-21
Received: 6 June 2018
Accepted: 6 July 2018
First Online: 21 July 2018
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/or national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards. The local ethics committees of the two involved Centers (Fondazione Policlinico Universitario A. Gemelli IRCCS and Arcispedale Santa Maria Nuova—IRCCS Reggio Emilia) approved the study protocol, and all patients gave a general written informed consent for retrospective use of their data.
: Not applicable.
: The authors declare that they have no competing interests.
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