1. Department of Physiology, Medical Faculty University in Nis , Bulevar Dr. Zorana Djindjica 81, 18000 Nis , Serbia
2. Department of Physiology, Medical Faculty University in Nis , 18000 Nis , Serbia
3. Clinic for Cardiosurgery, Department of Anesthesiology and Intensive care, University Clinical center of Nis , 18000 Nis , Serbia