1. Psychology Department, Anglia Ruskin University, Cambridge, UK
2. Behavioural and Clinical Neuroscience Institute, University of Cambridge, Cambridge, UK
3. Department of Psychology, University of Cambridge, Cambridge, UK
4. Highly Specialized Obsessive Compulsive and Related Disorders Service, Hertfordshire Partnership University NHS Foundation Trust, Welwyn Garden City, UK
5. Hertfordshire Partnership University NHS Foundation Trust, Welwyn Garden City, UK
6. Postgraduate Medical School, University of Hertfordshire, Hatfield, UK
7. Department of Neuroscience, Psychology and Behaviour, University of Leicester, Leicester, UK