Ethical statement
In the Netherlands the study was submitted to the Medical Ethics Review Committee of the VU University Medical Centre (reference number 2020.255). No ethical approval was needed, since the Medical Research Involving Human Subjects Act did not apply on this study, as there was no infringement of the physical and/or psychological integrity of the participants.
In the United Kingdom the study was submitted to University of Central Lancashire (UCLan) Committee for Ethics and Integrity (Health Review Panel), which approved this study (HEALTH_0079).
Written informed consent was obtained from all subjects involved in the study.