1. Institute of Human Genetics, University of Regensburg, Regensburg, Germany.
2. Department of Internal Medicine I, University Hospital Regensburg, Regensburg, Germany.
3. Department of Operative Dentistry and Periodontology, University Hospital Regensburg, Regensburg, Germany.
4. Department of Oral and Maxillofacial Surgery, University Hospital Regensburg, Regensburg, Germany.