1. PSYTREC, Bilthoven, The Netherlands
2. NIJCA2RE, Behavioural Science Institute (BSI), Radboud University Nijmegen, Nijmegen, The Netherlands
3. Overwaal Centre of Expertise for Anxiety Disorders, OCD and PTSD, Institution for Integrated Mental Health Care Pro Persona, Nijmegen, The Netherlands
4. Institute of Psychology, Leiden University, Leiden, The Netherlands
5. Department of Psychiatry, Radboud University Medical Centre, Nijmegen, The Netherlands
6. Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and VU University Amsterdam, Amsterdam, The Netherlands
7. School of Health Sciences, University of Salford, Manchester, UK
8. Institute of Health and Society, University of Worcester, Worcester, UK