[1] Univ Alabama Birmingham, Dept Radiol, 619 19th St South, Birmingham, AL 35294 USA
[2] Duke Univ, Dept Diagnost Radiol, Durham, NC USA
[3] Univ Utah, Dept Radiol, Musculoskeletal Radiol, Salt Lake City, UT USA
[4] Indiana Univ, Dept Diagnost Radiol, Dept Radiol, Div Chief Neuroradiol, Indianapolis, IN USA
[5] Mayo Clin, Dept Radiol, Rochester, MN USA
[6] COOK CTY HOSP, DEPT RADIOL, CHICAGO, IL USA
[7] UNIV ILLINOIS, COOK CTY CHILDRENS HOSP, DEPT PEDIAT RADIOL, CHICAGO, IL 60612 USA
[8] Vanderbilt Univ, Med Ctr, Med Ctr, Med Ctr Dept Diagnost Radiol, Nashville, TN USA
[9] Stanford Univ, Dept Diagnost Radiol, Dept Radiol, Stanford, CA 94305 USA
[10] Univ Southern Calif, Keck Sch Med, Keck Sch Med, Los Angeles, CA 90007 USA
[11] Univ Southern Calif, Keck Sch Med, Dept Radiol, Los Angeles, CA 90033 USA
[12] Washington Univ, Dept Radiol, St Louis, MO USA
[13] Duke Univ, Dept Radiol, Durham, NC USA