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Article History

Received: 29 January 2016

Accepted: 6 June 2018

First Online: 13 June 2018

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: Ethical clearance was obtained from the ethical committee of the Ghent University Hospital. No written consent was obtained, but by participating in the online survey, respondents agreed to participate and had read the consent form that stipulates that participation is voluntary, respondents can refuse to participate or to continue and can withdraw at any time.

: The authors declare that they have no competing interests.

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