[1] Chinese Univ Hong Kong, Dept Med & Therapeut, Hong Kong, Peoples R China
[2] Univ Chicago, Dept Neurol, Chicago, IL USA
[3] Ajou Univ, Sch Med, Dept Neurol, Med Ctr, Suwon, South Korea
[4] Henry Ford Hlth Syst, Dept Neurol, Detroit, MI USA
[5] Univ Calif Los Angeles, Dept Neurol, Neurovasc Imaging Res Core, Los Angeles, CA USA
[6] Univ Calif Los Angeles, UCLA Stroke Ctr, Los Angeles, CA USA