1. Department of Internal Medicine, University Hospital Ostrava, Ostrava, Czech Republic;
2. Department of Clinical Studies, Faculty of Medicine, University of Ostrava, Ostrava, Czech Republic;
3. Department of Internal Medicine III – Nephrology, Rheumatology and Endocrinology, University Hospital and Faculty of Medicine and Dentistry, Palacky University Olomouc, Olomouc, Czech Republic;
4. Department of Nephrology, Institute for Postgraduate Education Prague, Vinohrady, Czech Republic