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Article History

Received: 3 January 2018

Accepted: 21 March 2018

First Online: 2 April 2018

Ethics approval and consent to participate

: Ethics approval for this study is not required under Dutch law as no patient data was collected; informed consent was obtained from participants and respondents.

: Not applicable.

: The authors declare that they have no competing interests.[All authors have completed the Unified Competing Interest form at(available on request from the corresponding author) and declare that (1) the authors not have been funded; (2) no authors have had relationships that might have an interest in the submitted work in the previous 3 years; (3) their spouses, partners, or children have no financial relationships that might be relevant to the submitted work; and (4) none of the authors has financial interests that might be relevant to the submitted work.]

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