1. Diabetes Center, Division of Endocrinology and Metabolism, First Department of Internal Medicine, AHEPA University Hospital, Medical School Aristotle University of Thessaloniki, Thessaloniki, Greece
2. Department of Clinical Biochemistry, Royal Free Hospital Campus, University College London Medical School, University College London (UCL), London, UK
3. Department of Hypertension, WAM University Hospital in Lodz, Medical University of Lodz, Lodz, Poland
4. Polish Mother’s Memorial Hospital Research Institute (PMMHRI), Lodz, Poland