[1] LOUISIANA STATE UNIV,MED CTR,DEPT NEUROSURG,NEW ORLEANS,LA 70112
[2] LOUISIANA STATE UNIV,MED CTR,DEPT SURG,NEW ORLEANS,LA 70112
[3] LOUISIANA STATE UNIV,MED CTR,DEPT PHYSIOL,NEW ORLEANS,LA 70112
[4] ALTON OCHSNER MED FDN & OCHSNER CLIN,NEW ORLEANS,LA 70121
[5] LOUISIANA STATE UNIV,SCH MED,SHREVEPORT,LA 71105