1. Clinical Department of Nephrology, Transplantology and Internal Medicine, Pomeranian Medical University in Szczecin, Szczecin, Poland;
2. Department of Medical Chemistry, Pomeranian Medical University, Szczecin, Poland;
3. Department of Biochemistry, Pomeranian Medical University, Szczecin, Poland;
4. Department of Physiology, Pomeranian Medical University, Szczecin, Poland;
5. Department of Obstetrics, Pomeranian Medical University, Szczecin, Poland