Text and Data Mining valid from 2019-01-25
Received: 21 September 2018
Accepted: 14 January 2019
First Online: 25 January 2019
Ethics approval and consent to participate
: Institutional Research Review Board at IRCCS-ISMETT approved this study, with a waiver of informed consent.
: Not applicable.
: The authors declare that they have no competing interests.
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