Abdul-Rahim AH, Ali M, Fitzmaurice DA, Lip GYH, Mant J, Davis BR, Waldo AL, Berry C, McMurray JJV, Petrie JR, Sattar N, Lowe GD, Herz M, Lees KR, for the VICCTA Steering Committee, Advancing knowledge by optimising use of existing data: VICCTA Collaboration. Poster Presented at International Stroke Conference 2014, San Diego, Ca., USA.