1. Department of Neurosurgery and Stanford Stroke Center and
2. Department of Neurology and Neurological Sciences and Stanford Stroke Center, Stanford University School of Medicine and Stanford Health Care, Stanford, California;
3. Department of Neurosurgery, New York University and NYU Langone Medical Center, New York, New York;
4. Departments of Neurology and
5. Neurosurgery, University of Pittsburgh Medical School and University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania;
6. Department of Neurology, University of California, San Francisco, California;
7. SanBio, Inc., Mountain View, California; and
8. Biostatistical Consulting Inc., Lexington, Massachusetts