1. From the Department of Neurology, University of California, San Francisco (A.M., J.S.Y., M.A.Y.)
2. San Francisco Veterans Affairs Medical Center, CA (A.M., J.S.Y., M.A.Y.)
3. Department of Neurology, Tokai University School of Medicine, Isehara, Japan (A.M.)
4. Department of Emergency Medicine, Yonsei University College of Medicine, Seoul, South Korea (J.S.Y.).