Funding for this research was provided by:
Horizon 2020 (646734)
Text and Data Mining valid from 2019-07-29
Received: 15 March 2019
Accepted: 24 July 2019
First Online: 29 July 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/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. Our retrospective study was approved by the local ethics committee, who waived the need for informed consent of the patients involved.
: Not applicable.
: The authors declare that they have no competing interests.