1. University of Novi Sad, Faculty of medicine , Department of neurology , Novi Sad , Serbia
2. University of Novi Sad, Faculty of medicine , Department of psychiatry , Novi Sad , Serbia
3. University of Novi Sad, Faculty of medicine , Department of internal medicine-endocrinology , Novi Sad , Serbia
4. University of Novi Sad, Faculty of medicine , Department of nursing , Novi Sad , Serbia