[1] Albert Einstein Coll Med, Montefiore Med Ctr, Dept Neurol Surg, Bronx, NY USA
[2] Mayo Clin, Dept Radiol, Rochester, NY USA
[3] Albert Einstein Coll Med, Montefiore Med Ctr, Montefiore Einstein Cerebrovasc Res Lab, Bronx, NY USA
[4] Albert Einstein Coll Med, Montefiore Med Ctr, Dept Neuroradiol, Bronx, NY USA
[5] Albert Einstein Coll Med, Montefiore Med Ctr, Montefiore Spine Res Grp, Bronx, NY USA
[6] Monash Hlth, Dept Intervent Neuroradiol, Clayton, Vic, Australia
[7] Monash Univ, Dept Image, Fac Med Nursing & Hlth Sci, Clayton, Vic, Australia
[8] Univ Toronto, St Michaels Hosp, Neurovasc Ctr, Div Therapeut Neuroradiol, Toronto, ON, Canada
[9] Univ Toronto, St Michaels Hosp, Neurovasc Ctr, Div Neurosurg, Toronto, ON, Canada
[10] Washington Univ St Louis, Mallinckrodt Inst Radiol, Sch Med, Musculoskeletal Radiol, St Louis, MO USA
[11] Robert Wood Johnson Univ Hosp, New Brunswick, NJ USA
[12] Massachusetts Gen Hosp, Dept Orthoped, Boston, MA USA
[13] Harvard Med Sch, Brigham & Womens Hosp, Boston, MA USA
[14] Harvard Med Sch, Massachusetts Gen Hosp, Neuroendovasc Program, Boston, MA 02115 USA
[15] Harvey L Neiman Hlth Policy Inst, Reston, VA USA