Article History
Received: 20 December 2019
Accepted: 20 April 2020
First Online: 20 July 2020
Change Date: 21 July 2020
Change Type: Correction
Change Details: An amendment to this paper has been published and can be accessed via the original article.
Ethics approval and consent to participate
: The Medical Ethics Review Board of the UMCG concluded that this study was not subject to the Medical Research Involving Human Subjects Act. Respondents participated in this study voluntary. All participants provided written informed consent. They could withdraw at any time without any consequence or penalty. Data were collected and analysed anonymously.
: Not applicable.
: The authors declare that they have no competing interests.