1. Department of Child and Adolescent Psychiatry, Psychosomatics and Psychotherapy; University Clinics RWTH Aachen; Aachen Germany
2. Department of Medical Statistics; University of Marburg; Marburg Germany
3. Department of Child and Adolescent Psychiatry, Psychosomatics and Psychotherapy; University of Würzburg; Würzburg Germany
4. Department of Child and Adolescent Psychiatry, Psychosomatics and Psychotherapy; Charité Universitätsmedizin Berlin; Berlin Germany
5. Department of Child and Adolescent Psychiatry and Psychotherapy; University Clinics Freiburg; Freiburg Germany
6. Department of Child and Adolescent Psychiatry and Psychotherapy; Kliniken der Stadt Köln; Köln Germany