1. Department of Neurosurgery, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts
2. Oculoplastic and Orbital Surgery Service, Department of Ophthalmology, Massachusetts Eye and Ear Infirmary, Boston, Massachusetts
3. Department of Radiology, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts
4. Department of Surgery, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts