1. University Clinical Center of Vojvodina, Clinic of Anesthesia, Intensive Care and Pain Therapy, Novi Sad, Serbia + University of Novi Sad, Faculty of Medicine, Department of Anesthesiology and Perioperative Medicine, Novi Sad, Serbia
2. University Clinical Center of Vojvodina, Clinic of Anesthesia, Intensive Care and Pain Therapy, Novi Sad, Serbia
3. University Clinical Center of Vojvodina, Clinic of Anesthesia, Intensive Care and Pain Therapy, Novi Sad, Serbia + University of Novi Sad, Faculty of Medicine, Department of Nursing, Novi Sad, Serbia