Received: 17 August 2021
Accepted: 31 October 2021
First Online: 10 November 2021
: In November 2018 the Utrecht Medical Research Ethics Committee confirmed that the Medical Research Involving Human Subjects Act (WMO) does not apply to this study (reference number WAG/mb/18/041978), consequently waiving the need for informed consent.
: Not applicable.
: The authors declare that they have no competing interests.