- Correspondence to Dr Coen A Wijdicks, Steadman Philippon Research Institute, 181 W. Meadow Drive, Suite 1000, Vail, CO 81657, USA; .
- Received August 23, 2013
- Revised October 29, 2013
- Accepted November 3, 2013
- First published November 26, 2013.
If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.