[1] Jikei Univ, Sch Med, Dept Rehabil Med, Minato Ku, Tokyo 1058471, Japan
[2] Stanford Univ, Med Ctr, Stanford Stroke Ctr, Dept Neurol & Neurol Sci, Palo Alto, CA 94304 USA
[3] Univ Hosp Leuven, Dept Neurol, Louvain, Belgium
[4] Stanford Univ, Med Ctr, Stanford Stroke Ctr, Dept Radiol, Palo Alto, CA 94304 USA
[5] Univ Pittsburgh, Med Ctr, Stroke Inst, Dept Neurol, Pittsburgh, PA USA