1. Department of Internal Medicine, Neurology, Dermatology, Clinic for Endocrinology, Diabetology and Nephrology, University Leipzig, Leipzig, Germany
2. Division of Nephrology, Department of Internal Medicine III, University Hospital Carl Gustav Carus at the Technische Universität Dresden, Dresden, Germany
3. Institute of General Practice and Family Medicine, Medical Faculty, Martin Luther-University Halle-Wittenberg, Halle, Germany
4. Department of Head Medicine and Oral Health, Department of Ophthalmology, University Leipzig, Leipzig, Germany
5. Center for Geriatric Medicine at Bezirksklinikum Regensburg, Regensburg, Germany
6. Medical Department I, Nephrology Devision, University Hospital, Ulm, Germany
7. Translational & Experimental Medicine, Luxembourg Centre de Systems Biomedicine, Luxembourg
8. Department of Internal Medicine II, Saarland University, Homburg Saar, Germany
9. Division of Nephrology and KfH Renal Unit, Hospital St. Georg, Leipzig, Germany, Martin-Luther-University Halle/Wittenberg, Germany