Received: 25 July 2018
Accepted: 6 May 2019
First Online: 11 June 2019
Ethics approval and consent to participate
: Participant consent was not necessary as this study used de-identified data which was collected as part of evaluation of patient care. As the data used were already available and patients were not physically involved in the research, the study is not subject to the Dutch Medical Research (Human Subjects) Act (WMO) which was confirmed by the Medical Research and Ethics Committee of the Maastricht University Medical Centre (Application number: 14–4-136).
: Not applicable.
: The authors declare that they have no competing interests.
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