1 Division of Vascular and Endovascular Surgery, Department of General, Visceral and Transplantation Surgery, University Hospital Essen, University Duisburg-Essen, Essen, Germany.
2 Department of General, Visceral and Transplantation Surgery, University Hospital Essen, University of Duisburg-Essen, Essen, Germany.
3 Institute of Pharmacology and Toxicology, Ruhr-University Bochum, Bochum, Germany.
4 Department of Neurology, University Hospital Essen, University of Duisburg-Essen, Essen, Germany.