1. Department of Internal Diseases, Nephrology and Dialysis, Military Institute of Medicine, Warsaw, Poland
2. Department of Internal Medicine and Nephrodiabetology, Chair of Internal Diseases and Cardiology, Medical University of Łódź, Łódź, Poland
3. Department of Laboratory Diagnostics, Military Institute of Medicine, Warsaw, Poland
4. Department of Gastroenterology, Endocrinology and Internal Diseases, Military Institute of Medicine, Warsaw, Poland