1. Surgical Planning Laboratory, Department of Radiology, Brigham and Women's Hospital, Harvard Medical School, Massachusetts
2. BrainLAB AG, Feldkirchen, Germany
3. Golby Laboratory, Brigham and Women's Hospital, Harvard Medical School, Massachusetts
4. Department of Diagnostic Radiology, Yale University of Medicine, and Department of Biomedical Engineering, Yale University, New Haven, Connecticut
5. Department of Neurosurgery, Brigham and Women's Hospital, Harvard Medical School, Massachusetts