Received: 27 October 2017
Accepted: 20 February 2018
First Online: 27 February 2018
Ethics approval and consent to participate
: Written approval to conduct this study was received from the medical ethics research committee of the Erasmus MC University Medical Centre (Erasmus MC), Rotterdam, the Netherlands (MEC-2015-240). This study is registered in the Dutch National Trial Register (NTR5145).
: Not applicable.
: The authors declare that they have no competing interests.
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