1 University Clinic for Nephrology and Hypertension, Diabetes and Endocrinology, Otto-von-Guericke-University, Magdeburg, Germany. Electronic address: jan.schiefer@med.ovgu.de.
2 Institute of Human Genetics, Otto-von-Guericke University, Magdeburg, Germany.
3 German Cancer Research Center (DKFZ), Division of Cellular and Molecular Pathology, Heidelberg, Germany.
4 University Clinic for Nephrology and Hypertension, Diabetes and Endocrinology, Otto-von-Guericke-University, Magdeburg, Germany.
5 University Clinic for Nephrology and Hypertension, Diabetes and Endocrinology, Otto-von-Guericke-University, Magdeburg, Germany. Electronic address: liakopul@otenet.gr.