. Author manuscript; available in PMC: 2014 Jan 1.
Published in final edited form as: J Stroke Cerebrovasc Dis. 2011 Jun 29;22(1):15–21. doi: 10.1016/j.jstrokecerebrovasdis.2011.05.025
© 2011 National Stroke Association. Published by Elsevier Inc. All rights reserved.