Article History
Received: 24 August 2018
Accepted: 18 January 2019
First Online: 23 January 2019
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: This study was completed in compliance with national legislation and the guidelines of the ethics committee of the University Hospitals Leuven.
: Informed consent was obtained from all individual participants included in the study.