Text and Data Mining valid from 2020-03-02
Received: 26 November 2019
Accepted: 21 February 2020
First Online: 2 March 2020
Ethics approval and consent to participate
: All procedures performed 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 ethical review board approved this retrospective analysis (Comitato Etico Cantonale, Email address: ExternalRef removed - Web page: ExternalRef removed).
: Not applicable.
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