1. Institute of Pharmacology of Natural Products & Clinical Pharmacology; Ulm University; Ulm Germany
2. Institute of Epidemiology and Medical Biometry; Ulm University; Ulm Germany
3. Department of Oral Medicine, Diagnosis, and Periodontology; Faculty of Dentistry, Cairo University; Cairo Egypt
4. Institute of Clinical Pharmacology, Immanuel Klinik Rüdersdorf; Brandenburg Medical School Theodor Fontane; Rüdersdorf Germany