1. Department of Neurosurgery, University of California, Irvine, Orange, California;
2. Department of Neurologic Surgery, Mayo Clinic, Rochester, Minnesota;
3. Department of Neurosurgery, University at Buffalo School of Medicine, Buffalo, New York;
4. Department of Neurosurgery, Keck School of Medicine of USC, Los Angeles, California;
5. Department of Biomedical Engineering, California Institute of Technology, Pasadena, California;
6. Department of Neurosurgery, University of California San Diego School of Medicine, San Diego, California;
7. Department of Neurosurgery, University of Florida, Gainesville, Florida;
8. Department of Neurologic Surgery, Mayo Clinic, Scottsdale, Arizona; and
9. Johns Hopkins Whiting School of Engineering, Baltimore, Maryland