Funding for this research was provided by:
Received: 8 January 2020
Accepted: 7 May 2020
First Online: 13 May 2020
Ethics approval and consent to participate
: The study was approved by the Research Ethics Committee of the Radboud University Medical Centre (NL44030.091.13). The participating institutions approved the research. All participants gave written informed consent.
: Not applicable.
: The authors declare that they have no competing interests.