1. Department of Psychology; University of Koblenz-Landau; Landau Germany
2. Department of Cognitive und Clinical Neuroscience; Medical Faculty Mannheim; Central Institute of Mental Health; Heidelberg University; Mannheim Germany
3. Department of Neurology; University Medical Center Mainz; Mainz Germany
4. Center of Pain Therapy; Clinic of Anaesthesia and Intensive Care; University Medical Center Mannheim; Heidelberg University; Mannheim Germany
5. Department of Neurology; Fürth General Hospital; Fürth Germany
6. Department of Physiology and Pathophysiology; University of Erlangen-Nuremberg; Erlangen Germany