[1] UNIV TEXAS, MED BRANCH, DEPT RADIOL, DIV NEURORADIOL, GALVESTON, TX 77550 USA
[2] UNIV TEXAS, MED BRANCH, DEPT PATHOL, GALVESTON, TX 77550 USA
[3] UNIV TEXAS, MED BRANCH, DEPT SURG, GALVESTON, TX 77550 USA
[4] UNIV TEXAS, MED BRANCH, DEPT NEUROSURG, GALVESTON, TX 77550 USA