1. Collegium Medicum, Jan Kochanowski University, Kielce, Poland
2. Department of Environmental Medicine, Poznan University of Medical Sciences, Poznan, Poland
3. Department of Infectious Diseases and Hepatology, Medical University of Białystok, Białystok, Poland
4. Department of Infectious Diseases and Hepatology, Faculty of Medicine, Collegium Medicum Bydgoszcz, Nicolaus Copernicus University, Toruń, Poland
5. Department of Infectious Diseases and Allergology, Jan Kochanowski University, Kielce, Poland