Funding for this research was provided by:
Universitair Medisch Centrum Groningen
Rijksuniversiteit Groningen
Article History
Received: 30 April 2018
Accepted: 29 October 2018
First Online: 12 November 2018
Ethics approval and consent to participate
: The study was approved by the Ethical Committee of Psychology of the University of Groningen (16237-O) and complies to the Dutch law on Medical Research involving human subjects. Participants have to give online informed consent, by actively ticking a box, before they can participate Additional file . This informed consent includes consent for publication. In case of important protocol modifications regarding outcome variables, the changes will be passed on to the trial register.
: Not applicable: no personal information is provided.
: The authors declare that they have no competing interests.
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