1. Division of Burns/Trauma/Critical Care, Department of Surgery, UT Southwestern Medical Center, Parkland Memorial Hospital, Dallas, Texas.
2. Division of Vascular Surgery, Department of Surgery, Vanderbilt Medical Center, Nashville, Tennessee.
3. Department of Neurological Surgery, UT Southwestern Medical Center, Parkland Memorial Hospital, Dallas, Texas.
4. Department of Radiology, UT Southwestern Medical Center, Parkland Memorial Hospital, Dallas, Texas.