1. Department of Clinical Epidemiology; Leibniz Institute for Prevention Research and Epidemiology-BIPS; Bremen Germany
2. Department of Health Services Research; Carl von Ossietzky University Oldenburg; Oldenburg Germany
3. Department of Biometry and Data Management, Leibniz Institute for Prevention Research and Epidemiology-BIPS; Bremen Germany
4. Department of Child and Adolescent Psychiatry and Psychotherapy, Central Institute of Mental Health, Medical Faculty Mannheim; University of Heidelberg; Mannheim Germany