1. Department of Periodontology, University Hospital Wuerzburg, Wuerzburg, Germany
2. Institute of Food Science and Biotechnology, Chair Plant Foodstuff Technology and Analysis, University of Hohenheim, Stuttgart, Germany
3. King Abdulaziz University, Faculty of Science, Biological Science Department, Jeddah, Saudi Arabia
4. Private Practice for Cardiology and Internal Medicine, Bonn, Germany