Funding for this research was provided by:
This study was supported by an unrestricted grant from Achmea Healthcare Foundation (Ref. Z634). (Ref. Z634)
Received: 29 April 2018
Accepted: 26 August 2018
First Online: 5 September 2018
: Ethical approval for this study was obtained from the Medical Research Ethics Committee of the Erasmus University Medical Center in Rotterdam, The Netherlands (Ref. MEC-2014-322).
: Not applicable.
: The authors declare that they have no competing interests.
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