1. Department of Anesthesiology and Intensive Care, Medical Faculty, University of Pristina – Kosovska Mitrovica, Serbia
2. Department of Gynecology, Spebo Medical Special Hospital for Fertility Treatments, Leskovac, Serbia
3. Department of Surgery, Medical Faculty, University of Pristina – Kosovska Mitrovica, Serbia
4. Department of Anesthesiology, General Hospital, Leskovac, Serbia
5. Department of Dentistry, Medical Faculty, University of Pristina – Kosovska Mitrovica, Serbia
6. Department of Anesthesiology, Clinic for Cardiovascular Surgery, Institute of Cardiovascular Diseases of Vojvodina, Sremska Kamenica, Serbia