1. Ludwig Boltzmann Institute for Rehabilitation Research, Vienna, Austria
2. VAMED Rehabilitation Montafon, Schruns, Austria
3. University Hospital of Psychiatry II, Department of Psychiatry, Psychotherapy Psychosomatics and Medical Psychology, Medical University of Innsbruck, Innsbruck, Austria
4. Department of Psychosomatic Medicine and Psychotherapy, Justus Liebig University Giessen, Giessen, Germany
5. Anna Freud National Centre for Children and Families, London, UK
6. Research Department for Clinical, Educational and Heath Psychology, UCL, London, UK
7. VAMED Rehabilitation Center Kitzbuehel, Kitzbuehel, Austria
8. Department for Psychosomatic Medicine and Psychotherapy, Medical Center of the Philipps University Marburg, Marburg, Germany