Received: 13 May 2019
Accepted: 12 July 2019
First Online: 30 July 2019
Ethics approval and consent to participate
: We performed this study in compliance with the 1964 Helsinki Declaration and its later amendments and federal laws in the Netherlands and the European Union. Following review of the study design and protocol, the local Medical Research Ethical Committee (MREC)(Medisch Ethische Toetsingscommissie Utrecht) confirmed that the Medical Research Involving Human Subjects Act (WMO) does not apply to this study and that therefore an official approval of this study by the local MREC is not required under the WMO (protocol number: 18–120). All patients signed written informed consent for participation in this study.
: All patients signed written informed consent for the use of their data in this article.
: The authors declare that they have no competing interests.