1. University of California San Diego Medical Center, Department of Radiology, 225 Dickinson Street, San Diego, CA 92103, USA
2. New England Medical Center, Tufts University, Department of Neurological Surgery, 1 Kneeland Street Boston, MA 02111, USA
3. The Neurological Clinic 3006 S. Alameda Corpus Christi, TX 78404, USA