1. University Outpatient Clinic for Conservative Dentistry and Periodontology, Martin-Luther-University Halle-Wittenberg, 06112 Halle, Germany
2. Department of Visceral, Vascular and Endocrine Surgery, University Medical Center Halle, Martin-Luther-University Halle-Wittenberg, 06120 Halle, Germany
3. Center for Medical Basic Research, Martin-Luther-University Halle-Wittenberg, 06108 Halle, Germany
4. Private Dental Practice, Dr. Juliane Gernhardt, 06120 Halle, Germany