[1] Graz Univ, Inst Gen & Expt Pathol, A-8010 Graz, Austria
[2] Gen Hosp Klagenfurt, Dept Anaesthesiol & Intens Care, Amstetten, Austria
[3] Gen Hosp Klagenfurt, Dept Neurosurg, Amstetten, Austria
[4] Gen Hosp Klagenfurt, Dept Neurol, Amstetten, Austria
[5] Neurol Clin, Dept Neurol, Amstetten, Austria