[1] Univ Washington, Harborview Med Ctr, Neurol, Box 359775, Seattle, WA USA
[2] Cornell Univ, Neurol, New York, NY USA
[3] Univ Washington, Biostat, Seattle, WA USA
[4] Columbia Univ, Neurol, New York, NY USA
[5] Univ Cincinnati, Neurol & Rehabil Med, Cincinnati, OH USA
[6] Med Univ South Carolina, Publ Hlth Sci, Charleston, SC USA
[7] Columbia Univ, Cardiol, New York, NY USA
[8] Univ Toronto, Sunnybrook Res Inst, Sunnybrook Hlth Sci Ctr, Med Neurol, Toronto, ON, Canada
[9] McMaster Univ, Med, Toronto, ON, Canada
[10] NINDS, NIH, Bethesda, MD USA