1. The Institute of Stroke and Cerebrovascular Diseases and The Department of Neurology, McGovern Medical School at The University of Texas Health Science Center, Houston (L.E.F., L.D.M., A.Z.S.)
2. From the McGovern Medical School and Institute for Stroke and Cerebrovascular Disease, Houston, TX (G. C. H.)
3. Center for Clinical and Translational Sciences, The Department of Neurology, McGovern Medical School at The University of Texas Health Science Center, Houston (L.Z.)
4. Department of Neurology, University of Miami Miller School of Medicine, FL (M.A.P.-P.)
5. Department of Neurology, University of California, San Francisco, (B.O.).