1. Department of Nephrology, Hypertension and Family Medicine, WAM University Hospital in Lodz, Medical University of Lodz, Lodz, Poland
2. Department of Hypertension, WAM University Hospital in Lodz, Medical University of Lodz, Lodz, Poland
3. Department of Laboratory Diagnostics and Clinical Biochemistry, Medical University of Lodz, Lodz, Poland
4. BioMedical Department of Internal Medicine and Medical Specialties, University of Palermo, Italy
5. Euro-Mediterranean Institute of Science and Technology, Italy
6. CGH Medical Center, Sterling, IL, USA
7. University of Illinois College of Medicine, Peoria, IL, USA