1. Rosanne House, Hertfordshire Partnership University NHS Foundation Trust, Welwyn Garden City, UK;
2. Derwent Centre, Essex Partnership University NHS Foundation Trust, Harlow, UK;
3. Department of Life and Medical Science, University of Hertfordshire, Hatfield, UK;
4. Highly Specialised OCD/BDD Services, Hertfordshire Partnership University NHS Foundation Trust, Welwyn Garden City, UK;
5. Cavell Centre, Cambridgeshire and Peterborough NHS Foundation Trust, Peterborough, UK;
6. East London NHS Foundation Trust, Bedford, UK;
7. Northumberland, Tyne and Wear NHS Foundation Trust, Newcastle, UK;
8. Postgraduate Medical School, University of Hertfordshire, Hatfield, UK;
9. University of Cambridge, School of Clinical Medicine, Cambridge, UK