Funding for this research was provided by:
ZonMw (ZonMw 171002304)
Received: 14 May 2019
Accepted: 10 September 2019
First Online: 7 October 2019
Ethics approval and consent to participate
: Ethics approval was obtained from the local Institutional Review Board (CMO region Arnhem - Nijmegen, 2009/187, NL27344.091.09). All participants provided written informed consent.
: Not applicable.
: The authors declare that they have no competing interests.