Peters-Scheffer, Nienke http://orcid.org/0000-0003-4832-0241
Didden, Robert
Korzilius, Hubert
Verhoeven, Ludo
Funding for this research was provided by:
Radboud University
Article History
First Online: 3 February 2018
Compliance with Ethical Standards
:
: The authors declare that there is no conflict of interest.
: Ethical approval of the study was obtained from the ethics committee of the Radboud University and the ethics committees of some of the sites the participants visited.
: Informed consent was obtained from all individual participants included in the study.