1 Department of Vascular and Endovascular Surgery, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany. Electronic address: hheckstein@web.de.
2 Department of Internal Medicine, Division of Nephrology, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany.
3 Department of Vascular and Endovascular Surgery, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany.