[1] Med Univ South Carolina, Neurosurg, Charleston, SC 29425 USA
[2] Univ Tennessee, Ctr Hlth Sci, Neurosurg, Memphis, TN 38163 USA
[3] Univ Tennessee, Ctr Hlth Sci, Neurol, Memphis, TN 38163 USA
[4] Univ Med Goettingen, Neuroradiol, Gottingen, Germany
[5] Univ Med Goettingen, Neurol, Gottingen, Germany
[6] Washington Univ, Sch Med St Louis, St Louis, MO 63110 USA
[7] Univ Utah, Dept Neurol, Salt Lake City, UT USA
[8] Yale Univ, New Heaven, CT USA
[9] Univ Tennessee, Ctr Hlth Sci, Coll Med, Neurol, Memphis, TN 38163 USA
[10] Duke Univ Hosp, Durham, NC USA
[11] Univ Klinikum Gottingen, Dept Neurol, Gottingen, Niedersachsen, Germany
[12] Wake Forest Sch Med, Neurosurg, Winston Salem, NC 27101 USA
[13] Univ Athens, Attikon Hosp, Sch Med, Dept Neurol 2, Athens, Greece
[14] CHRU Nancy, Dept Diagnost & Intervent Neuroradiol, Nancy, Lorraine, France
[15] Baylor Coll Med, Dept Neurosurg, Houston, TX 77030 USA
[16] Univ Hosp Ctr Nancy, Neurol Stroke Unit, Nancy, France
[17] Baylor Coll Med, Dept Neurol, Houston, TX 77030 USA