Piironen Katja, Putaala Jukka, Rosso Charlotte, Samson Yves
Department of Neurology, Helsinki University Central Hospital, Haartmaninkatu 4, FIN-00290, Helsinki, Finland.
Stroke. 2012 Mar;43(3):898-902. doi: 10.1161/STROKEAHA.111.631218. Epub 2012 Feb 16.