1. Departments of Neurological Surgery and
2. Radiology, Mayo Clinic, Jacksonville, Florida;
3. Department of Neurological Surgery, Instituto Nacional de Neurología y Neurocirugía, Mexico City, Mexico;
4. Mayo Clinic Neuro-Informatics Laboratory, Mayo Clinic, Rochester, Minnesota;
5. Department of Neurological Surgery, Mayo Clinic, Rochester, Minnesota;
6. All India Institute of Medical Sciences, Kalyani, West Bengal, India; and
7. Department of Education, Division of Biomedical and Scientific Visualization, Mayo Foundation for Medical Education and Research, Mayo Clinic, Rochester, Minnesota