1. Department of Anxiety Disorders Outpatient Treatment Center PsyQ The Hague The Netherlands
2. Department of Clinical Psychology Leiden University Leiden The Netherlands
3. Department of Research and Development Arkin Amsterdam The Netherlands
4. Parnassia Psychiatric Institute The Hague The Netherlands
5. Methodology and Statistics Department Leiden University Leiden The Netherlands
6. Department of Medical and Clinical Psychology Tilburg University Tilburg The Netherlands
7. Department of Psychology, Education and Child Studies Erasmus University Rotterdam Rotterdam The Netherlands