1. Department of Psychology, Biological Psychology Unit, Karl-Franzens-University, Universitätsplatz 2/III, 8010 Graz, Austria
2. Department of Neurosurgery, Medical University, Auenbruggerplatz 2, 8036 Graz, Austria
3. Department of Surgery, Division of Vascular Surgery, Medical University, Auenbruggerplatz 2, 8036 Graz, Austria