Text and Data Mining valid from 2020-02-14
Received: 12 August 2019
Accepted: 31 January 2020
First Online: 14 February 2020
Compliance with ethical standards
: All authors declare that they have no competing interests.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee (Ethics Committee for Research, University Hospitals Leuven, Belgium; S60847) and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: Informed consent was obtained from all individual participants included in the study.