[1] Charite Univmed Berlin, Klin & Poliklin Neurol, Abt Expt Neurol, Charitepl 1, D-10117 Berlin, Germany
[2] Charite Univmed Berlin, Klin & Hochschulambulanz Neurol, D-10117 Berlin, Germany
[3] Klin Neurophysiol, D-10117 Berlin, Germany
[4] Ctr Stroke Res Berlin, D-10117 Berlin, Germany