Comment on

• Thrombolysis Guided by Perfusion Imaging up to 9 Hours after Onset of Stroke.

  Ma H, Campbell BCV, Parsons MW, Churilov L, Levi CR, Hsu C, Kleinig TJ, Wijeratne T, Curtze S, Dewey HM, Miteff F, Tsai CH, Lee JT, Phan TG, Mahant N, Sun MC, Krause M, Sturm J, Grimley R, Chen CH, Hu CJ, Wong AA, Field D, Sun Y, Barber PA, Sabet A, Jannes J, Jeng JS, Clissold B, Markus R, Lin CH, Lien LM, Bladin CF, Christensen S, Yassi N, Sharma G, Bivard A, Desmond PM, Yan B, Mitchell PJ, Thijs V, Carey L, Meretoja A, Davis SM, Donnan GA; EXTEND Investigators. Ma H, et al. N Engl J Med. 2019 May 9;380(19):1795-1803. doi: 10.1056/NEJMoa1813046. N Engl J Med. 2019. PMID: 31067369 Clinical Trial.