1. Department of Pharmacology, Faculty of Stomatology, University of Belgrade, Dr. Subotića br. 8, 11 000 Belgrade;
2. Department of Pharmacology, Medical Faculty, University of Niš;
3. Department of Pharmacology, Clinical Pharmacology and Toxicology, Medical Faculty, University of Belgrade; and
4. Department of Maxillofacial Surgery, Medical Faculty, University of Niš, Serbia and Montenegro