1. Medical Psychiatric Research Group Geestelijke Gezondheidszorg Eindhoven (GGzE) Eindhoven Netherlands
2. Department of Psychiatry and Neuropsychology MHeNs Maastricht University Maastricht Netherlands
3. Department of Clinical Psychological Sciences Maastricht University Maastricht Netherlands
4. Perth Voices Clinic Murdoch Australia
5. School of Psychological Science University of Western Australia Perth Australia
6. School of Psychology and Exercise Science Murdoch University Perth Australia
7. Psychology Department University of Southampton Southampton UK
8. Psychology Department, College Keep Southern Health NHSF Trust Southampton UK
9. Secondary Care Psychological Therapies Service Pennine Care National Health Service (NHS) Foundation Trust Lancashire UK
10. Division of Psychology and Mental Health The University of Manchester Manchester UK
11. Oxford Centre for Psychological Health Oxford UK
12. Oxford Institute of Clinical Psychology Training and Research Oxford UK
13. Behavioural Science Institute Radboud University Nijmegen Netherlands