Funding for this research was provided by:
Fonds Wetenschappelijk Onderzoek (G.0880.13, 11Z0916N, G0C5319N)
Text and Data Mining valid from 2019-08-05
Received: 17 April 2019
Accepted: 29 July 2019
First Online: 5 August 2019
Ethics approval and consent to participate
: This study was approved by the Ethics Committee of the University of Leuven. All participants provided written informed consent prior to the study.
: Not applicable.
: The authors declare that they have no competing interests.