1. Faculty of Medicine, University of Novi Sad, Department of Physiology, Novi Sad, Serbia
2. University Hospital Centre Split, Department of Neurology, Split, Croatia
3. University of Split School of Medicine, Integrative physiology, Split, Croatia
4. University of British Columbia, Okanagan Campus, Kelowna, British Columbia, Centre for Heart, Lung and Vascular Health, Kelowna, Canada