1. Department of Epidemiology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
2. Department of Gastroenterology and Hepatology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
3. Department of Medicine A, University Medicine Greifswald, Greifswald, Germany
4. Department of Medicine, Ludwig-Maximilians University, Munich, Germany
5. Department of Periodontology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
6. Institute of Clinical Chemistry and Laboratory Medicine, University Medicine Greifswald, Ernst-Moritz-Arndt-University, Greifswald, Germany
7. Institute for Community Medicine, University Medicine Greifswald, Greifswald, Germany, and German Center of Diabetes Research, Site Greifswald, Germany
8. Department of Dental Ecology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
9. Unit of Periodontology, Department of Restorative Dentistry, Periodontology, Endodontology, and Preventive and Pediatric Dentistry, University Medicine Greifswald, Greifswald, Germany