Received: 9 July 2019
Accepted: 21 July 2020
First Online: 31 July 2020
Ethics approval and consent to participate
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the Institutional Review Board of the University Medical Centre Groningen (METc number 2018/562) 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.
: Not applicable.
: The authors declare that they have no conflict of interest.