1. Medical Psychology and Medical Sociology, Medical Faculty, University of Freiburg, Freiburg, Germany
2. Department of Neurophysiology and Pathophysiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
3. Saarland University of Cooperative Education in Health Care and Welfare, Saarbrücken, Germany
4. Moving Concept, Freiburg, Germany
5. Department of Rehabilitation Psychology and Psychotherapy, Institute of Psychology, Freiburg, Germany