Verkuijl, Sanne J. http://orcid.org/0000-0001-6995-7941
Meinds, Rob J.
Trzpis, Monika
Broens, Paul M. A.
Article History
Received: 25 January 2019
Accepted: 18 May 2020
First Online: 3 June 2020
Ethics approval and consent to participate
: The collection of data for this study was carried out by an external agency, which was called Survey Sampling International (SSI) in 2016. Since the anonymous respondents are not medical patients and are selected by an independent non-medical company, we were neither obliged nor allowed to ask for informed consent. This is in accordance with the regulations of the Medical Ethics Review Board of the University Medical Center Groningen.
: Not applicable.
: The authors declare that they have no competing interests.