Funding for this research was provided by:
Stichting voor de Technische Wetenschappen (13524, 13525)
Received: 9 October 2018
Accepted: 19 March 2019
First Online: 27 March 2019
Ethics approval and consent to participate
: The study was approved by the medical ethics committee Arnhem-Nijmegen (NL53143.091.15) and all participants (and their parents if participant was younger than 18 years old) signed informed consent before participation.
: Not applicable.
: The authors declare that they have no competing interests.
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