1. Department of Nephrology, Hypertension and Internal Diseases, Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University in Torun, Bydgoszcz Poland
2. Department of Transplantology and Surgery, Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University in Torun, Bydgoszcz, Poland