1. Department of Gastroenterology and Internal Medicine, Medical University of Bialystok, Bialystok, Poland;
2. Department of Infectious Diseases and Hepatology, Medical University of Bialystok, Bialystok, Poland;
3. Department of Haematological Diagnostics, Medical University of Bialystok, Bialystok, Poland;
4. Department of Cardiosurgery, Medical University of Bialystok, Bialystok, Poland;
5. Department of Invasive Cardiology, Medical University of Bialystok, Bialystok, Poland