1. Department of Neurological Surgery, University of California, San Francisco, USA
2. Department of Radiology, Massachusetts General Hospital and Harvard Medical School, Boston, USA
3. Department of Neurological Surgery, Massachusetts General Hospital and Harvard Medical School, Boston, USA
4. College of Engineering and Applied Science, University of Wisconsin, Milwaukee, USA
5. Department of Neurosurgery, Medical College of Wisconsin, Milwaukee, USA
6. Department of Radiology and Biomedical Imaging, University of California, San Francisco, USA