[1] Charite Hosp, Dept Neurol, D-10098 Berlin, Germany
[2] Univ Minnesota, Sch Med, Lab Cerebrovasc Biol & Stroke, Dept Neurol, Minneapolis, MN 55455 USA
[3] Harvard Univ, Sch Med, Stroke Res Lab, Massachusetts Gen Hosp, Charlestown, MA 02129 USA
[4] Harvard Univ, Sch Med, Neurosurg Serv, Massachusetts Gen Hosp, Charlestown, MA 02129 USA
[5] Harvard Univ, Sch Med, Dept Neurol, Massachusetts Gen Hosp, Charlestown, MA 02129 USA
[6] Massachusetts Gen Hosp, Charlestown, MA 02129 USA