1. Faculty of Medicine, University of Southampton, Southampton, UK
2. Department of Psychiatry and Mental Health, University of Cape Town, Cape Town, South Africa
3. Neuroscience and Psychiatry Unit, University of Manchester, Manchester, UK
4. Division of Experimental Medicine, Imperial College London, London, UK
5. Karolinska Institutet, Stockholm, Sweden
6. Department of Psychiatry and Psychotherapy, University of Goettingen, Goettingen, Germany
7. Department of Nuclear Medicine and Molecular Imaging, University Medical Centre Groningen (UMCG), Groningen, The Netherlands
8. PRA International Zuidlaren,The Netherlands
9. Cambridge and Peterborough NHS Foundation Trust, Cambridge, UK
10. Centre for Addiction and Mental Health, University of Toronto, Toronto, ON, Canada
11. Postgraduate Medical School, University of Hertfordshire, Hatfield, UK
12. Anxiety UK, Manchester, UK
13. North Bristol NHS Trust, Bristol, UK
14. Institute of Psychiatry, Kings College London, London, UK
15. OCD Action, London, UK
16. Newcastle University, Newcastle, UK
17. Department of Psychiatry, Leiden University Medical Center, Leiden, The Netherlands
18. Institute of Clinical Psychology and Psychotherapy, Technical University Dresden, Dresden, Germany