1. Department of Audiology and Phoniatrics; Charité-University Medicine Berlin; Berlin Germany
2. Institute for Biometry and Clinical Epidemiology; Charité-University Medicine Berlin; Berlin Germany
3. Department of Psychology; University of Potsdam; Potsdam Germany
4. Department of Child and Adolescent Psychiatry, Psychosomatics and Psychotherapy; Charité-University Medicine Berlin; Berlin Germany