. Author manuscript; available in PMC: 2013 Oct 1.
Published in final edited form as: J Stroke Cerebrovasc Dis. 2011 Mar 16;21(7):600–606. doi: 10.1016/j.jstrokecerebrovasdis.2011.02.002
© 2011 National Stroke Association. Published by Elsevier Inc. All rights reserved.