1. Clinic of Internal Medicine I, Department of Cardiology, University Heart Center, Jena University Hospital, Jena, Germany.
2. Department of Zoology, Faculty of Science, Tanta University, Tanta, Egypt.
3. Department of Cranio-Maxillofacial Surgery and Plastic Surgery, Jena University Hospital, Jena, Germany.
4. Department of Physiology, Faculty of Medicine, Justus Liebig University, Giessen, Germany.