Time to Reperfusion and Treatment Effect for Acute Ischemic Stroke: A Randomized Clinical Trial. - Fransen PS; Berkhemer OA; Lingsma HF; Beumer D; van den Berg LA; Yoo AJ; Schonewille WJ; Vos JA; Nederkoorn PJ; Wermer MJ; van Walderveen MA; Staals J; et al. (JAMA neurology, 2016)