1. Institute for Clinical Diabetology Leibniz Center for Diabetes Research at Heinrich‐Heine‐University Duesseldorf Germany
2. Clinic and Policlinic for Oral and Maxillofacial Surgery University Hospital Aachen Aachen Germany
3. Institute for Biometrics and Epidemiology Leibniz Center for Diabetes Research at Heinrich‐Heine‐University Duesseldorf Germany
4. Centre for Immunobiology Blizard Institute Barts and the London School of Medicine and Dentistry Queen Mary University of London London UK