1. Department of Operative Dentistry and Periodontology, Medical Faculty, Martin-Luther-University Halle-Wittenberg, 06108 Halle, Germany
2. Center for Medical Basic Research, Medical Faculty, Martin-Luther-University Halle-Wittenberg, 06120 Halle, Germany
3. Department of Cardiology, Paracelsus-Harz-Clinic Bad Suderode, 06485 Quedlinburg, Germany
4. Department of Medicine III, Medical Faculty, Martin-Luther-University Halle-Wittenberg, 06120 Halle, Germany