1. Clinic for Psychosomatic Medicine and Psychotherapy, LVR-University Hospital Essen, University of Duisburg-Essen, 45147 Essen, Germany
2. Centre for Translational Neuro- and Behavioral Sciences (C-TNBS), University of Duisburg-Essen, 45147 Essen, Germany
3. Department of Pediatrics I, University Hospital of Essen, University of Duisburg-Essen, 45147 Essen, Germany