1. Institute for Medical Epidemiology, Biometrics and Informatics (IMEBI), Interdisciplinary Center for Health Sciences, Medical School of the Martin Luther University Halle-Wittenberg, Magdeburger Straße 8, 06112 Halle (Saale), Germany
2. Department of Education and Pedagogy, Faculty of Philosophy III, Martin Luther University Halle-Wittenberg, Franckeplatz 1, 06110 Halle (Saale), Germany