Authors
Z. Cherneva
University Hospital of the Ministry of Internal Affairs – Sofia, Bulgaria
R. Cherneva
University Hospital for Respiratory Diseases “Sv. Sophia” – Sofia, Bulgaria
E. Manov
Department of Propaedeutics of Internal Medicine, Clinic of Cardiology, Medical University – Sofia, Bulgaria
N. Runev
Department of Propaedeutics of Internal Medicine, Clinic of Cardiology, Medical University – Sofia, Bulgaria
