[1] Mayo Clin, Dept Neurosurg, 200 1st St Southwest, Rochester, MN 55905 USA
[2] Mayo Clin, Dept Neurol, 200 1st St Southwest, Rochester, MN 55905 USA
[3] Mayo Clin, Dept Radiol, 200 1st St Southwest, Rochester, MN 55905 USA
[4] 200 1st St Southwest, Rochester, MN 55905 USA