Funding for this research was provided by:
Deutsche Forschungsgemeinschaft (SCHE 2004/1-1)
Vlaamse regering (G009517N)
Ghent University (BOF16/MET_V/002)
Text and Data Mining valid from 2019-04-04
Received: 11 July 2018
Accepted: 29 March 2019
First Online: 4 April 2019
Compliance with ethical standards
: The authors declare that they have no conflict of interest.
: The present study was performed in accordance with the ethical standards laid down the Declaration of Helsinki and approved by the Ethical Committee of IfADo.