1. 1st Department of Medicine, School of Medicine, University of Pecs, Pecs, Hungary
2. Department of Pathophysiology and Gerontology, School of Medicine, University of Pecs, Pecs, Hungary
3. Hungarian National Ambulance Service, Pecs, Hungary
4. Department of Physiology and Biophysics, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA