1. From the Stroke Institute and UPMC Center for Neuroendovascular Therapy, Pittsburgh, PA (T.G.J.); Department of Neurology, University of Pittsburgh Medical Center, PA (T.G.J.); Department of Neurology, Stroke Center, Stanford University School of Medicine, Palo Alto, CA (G.W.A.); and Department of Neurology, Neurovascular Imaging Research Core, UCLA Stroke Center, University of California, Los Angeles (D.S.L.).