Received: 8 October 2021
Accepted: 10 March 2022
First Online: 28 May 2022
Change Date: 1 August 2022
Change Type: Correction
Change Details: A Correction to this paper has been published:
Change Details: https://doi.org/10.1186/s12909-022-03644-9
: The Ethical Review Board of the Netherlands Association for Medical Education approved this study (NERB number: 1040). Prior to the data collection informed consent was obtained from all participants i.e., the examiners of the portfolios. All methods were carried out in accordance with relevant guidelines and regulations.
: Not applicable.
: The authors report no conflicts of interest.