aThe Burnham Institute, Program in Developmental & Regenerative Cell Biology, La Jolla, California
bDepartment of Neurology, Harvard Medical School, Harvard Institutes of Medicine, Beth Israel-Deaconess Medical Center & Children's Hospital, Boston, Massachusetts
cDivision of Neurosurgery, Department of Surgery, Vancouver General Hospital, University of British Columbia, Vancouver, British Columbia
dLayton Bioscience, Sunnyvale, California
eDepartment of Neurology, University of California San Francisco, San Francisco, California
fDepartment of Neurosurgery, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania
gCenter for Molecular Imaging Research, Massachusetts General Hospital, Charlestown, Massachusetts
hDepartment of Pediatrics, Yonsei University College of Medicine, Seoul, South Korea
iDepartment of Neurosurgery, Harvard Medical School, Boston, Massachusetts.
Reprint requests: Evan Y. Snyder, MD, The Burnham Institute, Program in Development and Regeneration, 10901 N Torrey Pines Road, La Jolla, CA 92037. E-mail: [email protected].
No benefits in any form have been or will be received from a commercial party related directly or indirectly to the subject of this article.
Received on May 16, 2003; accepted for publication May 19, 2003.