Received: 14 August 2017
Accepted: 16 January 2018
First Online: 25 January 2018
Ethics approval and consent to participate
: The regional medical ethical committee (medical research ethics committee CMO/METC Arnhem-Nijmegen, the Netherlands) approved the study (NL43187.091.13), which was performed in full accordance with the Declaration of Helsinki. Informed consent was obtained.
: Written informed consent was obtained from the subjects for publication of their individual details in this manuscript. The consent form is held by the authors and is available for review by the Editor-in-Chief.
: The authors declare that they have no competing interests.
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