[1] Vanderbilt Univ Sch Med, Movement Disorder Div, Dept Neurol, 1161,21st Ave South Med Ctr North A 0118, Nashville, TN 37232 USA
[2] Vanderbilt Univ, Dept Engn, 2301,Vanderbilt Pl PMB 351826, Nashville, TN 37235 USA
[3] Vanderbilt Univ Sch Med, Dept Neurosurg, Ctr 1161,21st Ave South D-4303 Med Ctr North, Nashville, TN 37232 USA