1. Faculty of Medicine, Medical Academy, Lithuanian University of Health Sciences, 9 A. Mickeviciaus Street, LT-44307 Kaunas, Lithuania
2. Cardiology Clinic, University Hospital, Lithuanian University of Health Sciences, Eiveniu Str. 2, LT-50161 Kaunas, Lithuania
3. Institute of Physiology and Pharmacology, Medical Academy, Lithuanian University of Health Sciences, 9 A. Mickeviciaus Street, LT-44307 Kaunas, Lithuania