Funding for this research was provided by:
Universitair Medisch Centrum Groningen
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 InternalRef removed. 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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