1. Chair of Department of Health Economics, Epidemiology and Medical Informatics, Medical Advisory Board of Statutory Health Insurance in Northern Germany (MDK Nord), 23554 Lübeck, Germany, --- Select a Country ---
2. Medical Director of the Medical Advisory Service Institution of the Statutory Health Insurance in North Rhine (MDK Nordrhein), 40212 Düsseldorf, Germany, --- Select a Country ---
3. Chair of Research Methodology and Statistics in Psychology, Witten/Herdecke University, Alfred-Herrhausen-Straße 50, 58448 Witten, Germany, --- Select a Country ---
4. Faculty of Epidemiology, Christian-Albrechts University Kiel, 24105 Kiel, Germany, --- Select a Country ---