Article History
Received: 8 May 2018
Accepted: 17 August 2018
First Online: 24 August 2018
Ethics approval and consent to participate
: Participants that agreed to participate in the study provided their informed consent via e-mail. The UZ/KU Leuven Ethics Committee provided clearance and ruled that no formal ethics approval was required fort this study (decision number s61808).
: Every participant in this study has provided his/her informed consent for publication of the results.
: The authors declare that they have no competing interests.
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