Funding for this research was provided by:
Ministerie van Volksgezondheid, Welzijn en Sport
Received: 15 February 2018
Accepted: 11 December 2018
First Online: 20 December 2018
Ethics approval and consent to participate
: Ethical approval for this study was given by VU University Medical Center, Amsterdam, The Netherlands. Reference number: 2014.494.
: Not applicable.
: Authors have no competing interests.
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