Funding for this research was provided by:
First Online: 11 October 2019
Compliance with Ethical Standards
: The authors declare that they have no conflict of interest.
: All procedures were in accordance with ethical standards. The research protocol was approved by the Dutch Medical Ethics Committee for Mental Health Care (METiGG; reference number: NL31267.097.10). Maastricht University provided IRB approval for the study.
: Informed consent was obtained from all individual participants included in the study.