[1] Univ Cagliari, Dept Med Imaging, Cagliari, Italy
[2] Univ Washington, Dept Radiol, Seattle, WA 98195 USA
[3] Univ Washington, Dept Surg, Seattle, WA 98195 USA
[4] Johns Hopkins Univ Hosp, Russell H Morgan Dept Radiol & Radiol Sci, Baltimore, MD 21287 USA
[5] Walter Reed Natl Mil Med Ctr, Dept Radiol, Bethesda, MD USA
[6] Ludwig Maximilian Univ Hosp, Dept Radiol, Munich, Germany
[7] Univ Toronto, Sunnybrook Hlth Sci Ctr, Univ Hlth Network, Div Neuroradiol,Dept Med Imaging, Toronto, ON, Canada
[8] Univ Toronto, Sunnybrook Hlth Sci Ctr, Dept Med Imaging, Toronto, ON, Canada
[9] Cedars Sinai Med Ctr, Biomed Imaging Res Inst, Los Angeles, CA 90048 USA
[10] Yale Univ, Sch Med, Dept Neurosurg, Neurovasc Program, New Haven, CT USA
[11] Yale Univ, Sch Med, Dept Neurosurg, Stroke Program, New Haven, CT USA
[12] Yale Univ, Sch Med, Dept Radiol & Biomed Imaging, New Haven, CT USA
[13] Yale Univ, Sch Med, Dept Surg, New Haven, CT 06510 USA
[14] UCL, Inst Neurol, Neuroradiol Acad Unit, Dept Brain Repair & Rehabil, London, England
[15] Maastricht Univ, Med Ctr, CARIM Sch Cardiovasc Dis, Dept Radiol, Maastricht, Netherlands
[16] Univ Calif San Francisco, Dept Radiol & Biomed Imaging, San Francisco, CA 94143 USA
[17] Stanford Univ, Neuroradiol Div, Dept Radiol, Stanford, CA 94305 USA