Funding for this research was provided by:
Stichting voor de Technische Wetenschappen (Project 10739)
Received: 11 January 2019
Accepted: 30 April 2019
First Online: 7 May 2019
Ethics approval and consent to participate
: All subjects gave written informed consent in accordance with the Declaration of Helsinki prior to participation and the study is approved by the medical ethics committee of the Academic Medical Center in Amsterdam, The Netherlands.
: Not applicable.
: The authors declare that they have no competing interests.
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