- Correspondence to Dr Jan Claassen, Division of Critical Care Neurology, Department of Neurology, Columbia University, Milstein Hospital 8 Center, 177 Fort Washington Ave, New York, NY 10032, USA;
- Received October 27, 2009
- Revised July 6, 2010
- Accepted July 7, 2010
- First published September 30, 2010.
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