[1] KENNEBEC VALLEY MED CTR,AUGUSTA,ME 04330
[2] MEDTRONIC,DIV NEURO,MINNEAPOLIS,MN 55440
[3] UNIV TOULOUSE 3,NEUROSURG CLIN,F-31062 TOULOUSE,FRANCE
[4] MCMASTER UNIV,MED CTR,DIV NEUROL,HAMILTON L8S 4L8,ONTARIO,CANADA
[5] STANFORD UNIV,DEPT ELECT ENGN,STANFORD,CA 94305