1. Technische Universität München; Department of Psychosomatic Medicine and Psychotherapy; Langerstr. 3 München Germany D-81675
2. Health Care Center for Pain Medicine and Mental Health; Saarbrücken Germany
3. University of Duisburg-Essen; Department of Internal and Integrative Medicine, Kliniken Essen-Mitte, Faculty of Medicine; Am Deimelsberg 34 a Essen Germany D-45276
4. Oxford Oxfordshire UK
5. University of Alberta; Department of Medicine, Division of Preventive Medicine; 5-30 University Terrace 8303-112 Street Edmonton AB Canada T6G 2T4
6. Thame UK
7. Plymouth UK