1. “Overwaal” Centre of Expertise for Anxiety Disorders, OCD and PTSD; Institute for Integrated Mental Health Care “Pro Persona; Nijmegen Netherlands
2. Behavioural Science Institute; Radboud University; Nijmegen Netherlands
3. Department of Psychiatry; Radboud University Medical Centre; Nijmegen Netherlands
4. Cochrane ; London UK
5. Department of Psychiatry; Amsterdam University Medical Centre Vrije Universiteit, Amsterdam Public Health Institute and GGZ inGeest; Amsterdam Netherlands
6. Department of Psychiatry; University Medical Centre Groningen; Groningen Netherlands
7. Tees, Esk and Wear Valleys NHS Foundation Trust; Durham UK
8. Centre for Reviews and Dissemination; University of York; York UK