Article History
Received: 18 April 2017
Accepted: 11 February 2019
First Online: 18 February 2019
Ethics approval and consent to participate
: The current study was approved by the Medical Ethics Committee UZ KU Leuven (S58680). All participants signed an informed consent form. No animals were involved.
: Not applicable.
: The authors declare that they have no competing interests.
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