[1] Univ Virginia, Neurosurg, Charlottesville, VA 22903 USA
[2] Univ Texas McGovern Med Sch, Neurosurg, Houston, TX USA
[3] Med Univ South Carolina, Neurosurg, Charleston, SC USA
[4] Univ Louisville, Neurosurg, Louisville, KY USA
[5] Univ Med Goettingen, Neurol, Gottingen, NS, Germany
[6] Med Univ South Carolina, Neurol, Charleston, SC USA
[7] Thomas Jefferson Univ, Neurol Surg, Philadelphia, PA USA
[8] Chonnam Natl Univ Hosp, Gwangju, Gwangju, South Korea
[9] Wake Forest Sch Med, Neurosurg, Winston Salem, NC USA
[10] West Virginia Univ Hosp, Radiol, Morgantown, WV USA
[11] Univ Miami, Neurol Surg, Miller Sch Med, Miami, FL USA
[12] Univ Hosp Basel, Dept Neuroradiol, Clin Radiol & Nucl Med, Basel, Switzerland
[13] Univ Iowa, Roy J & Lucille A Carver Coll Med, Neurol, Iowa City, IA USA
[14] Semmes Murphey Neurol & Spine Inst, Memphis, TN USA
[15] Hyogo Coll Med, Dept Neurosurg, Nishinomiya, Hyogo, Japan
[16] Emory Univ, Neurosurg & Radiol, Sch Med, Atlanta, GA USA
[17] Emory Univ, Neurosurg, Atlanta, GA USA
[18] Ctr Hosp Lisboa Cent, Neuroradiol, Lisbon, Portugal
[19] Univ Florida, Dept Neurosurg, Gainesville, FL USA
[20] Univ Texas Hlth Sci Ctr San Antonio, Dept Neurosurg, San Antonio, TX USA
[21] Washington Univ St Louis, Neurosurg, Sch Med, St Louis, MO USA
[22] Yale Univ, Neurosurg, New Haven, CT USA
[23] Univ Washington, Neurol Surg, Sch Med, Seattle, WA USA
[24] Univ Arizona, Arizona Hlth Sci Ctr, Dept Surg, Div Neurosurg, Tucson, AZ USA
[25] LSUHSC, Neurosurgery, Shreveport, LA USA
[26] Allegheny Hlth Network, Neurol, Pittsburgh, PA USA
[27] Univ Hosp San Giovanni di Dio & Ruggi dAragona, Neurordiol, Salerno, Italy
[28] Med Uruguaya, Endovasc Neurosurg, Montevideo, Montevideo, Uruguay
[29] CHRU Nancy, Dept Diagnost & Intervent Neuroradiol, Nancy, Lorraine, France
[30] Univ S Florida, Neurosurg, Coll Med, Tampa, FL USA
[31] Washington Reg Med Ctr, Fayetteville, AR USA
[32] Indiana Univ, Bloomington, IN USA
[33] Univ Texas Med Branch Galveston, Neurosurg, Galveston, TX USA