1. Institute for Health Services Research and Health Economics, Center for Health and Society, Faculty of Medicine Heinrich‐Heine‐University Düsseldorf Düsseldorf Germany
2. Institute for Health Services Research and Health Economics, German Diabetes Center Leibniz Center for Diabetes Research at the Heinrich‐Heine‐University Düsseldorf Düsseldorf Germany
3. German Center for Diabetes Research (DZD) München‐Neuherberg Germany
4. mediStatistica Neuenrade Germany
5. Specialized Diabetes Practice Leverkusen Leverkusen Germany