[1] Charite Univ Med, Dept Neurol, D-10117 Berlin, Germany
[2] Charite Univ Med, Dept Expt Neurol, D-10117 Berlin, Germany
[3] Charite Univ Med, Dept Neuroradiol, D-10117 Berlin, Germany
[4] Charite Univ Med, Dept Physiol, D-10117 Berlin, Germany
[5] Univ Ulm, Dept Appl Physiol, D-89069 Ulm, Germany
[6] Ben Gurion Univ Negev, Zlotowski Ctr Neurosci, Dept Neurosurg, IL-84105 Beer Sheva, Israel
[7] Univ Munich, Klinikum Grosshadern, Dept Neurol, Munich, Germany