1. Department of Neurosurgery, The Warren Alpert Medical School of Brown University, Providence, Rhode Island, USA
2. Department of Diagnostic Imaging, The Warren Alpert Medical School of Brown University, Providence, Rhode Island, USA
3. Department of Neurology, The Warren Alpert Medical School of Brown University, Providence, Rhode Island, USA
4. Department of Surgery, The Warren Alpert Medical School of Brown University, Providence, Rhode Island, USA