Article Information
- Received May 17, 2011
- Revision received July 14, 2011
- Accepted July 17, 2011
- First published August 31, 2011.
- Version of record published August 31, 2011.
Author Information
Author contributions
Author contributions: J.E.P., V.T., A.W., and M.G. designed research; J.E.P. and V.T. performed research; V.T. contributed unpublished reagents/analytic tools; J.E.P. analyzed data; J.E.P., V.T., A.W., and M.G. wrote the paper.
Disclosures
- Received May 17, 2011.
- Revision received July 14, 2011.
- Accepted July 17, 2011.
This research was supported by the National Institutes of Health (NS54575, AG019714, AG17586, AG15116, AG32953, NS53488, and NS44266). V.T. is funded by a National Science Foundation Graduate Fellowship. We also gratefully acknowledge support from the W. M. Keck Foundation. We thank Michael Bonner for helpful comments on this manuscript, the radiographers at the Hospital of the University of Pennsylvania for their assistance with data collection, and our volunteers for their participation.
The authors declare no competing financial interests.
- Correspondence should be addressed to Dr. Jonathan Peelle, Department of Neurology, University of Pennsylvania, 3400 Spruce Street, Philadelphia, PA 19104, peelle{at}gmail.com
