1. From the Department of Otolaryngology–Head & Neck Surgery, University of North Carolina–Chapel Hill, Chapel Hill, NC
2. Department of Otolaryngology–Head and Neck Surgery, University of Pittsburgh Medical Center, Pittsburgh, PA
3. Department of Neurological Surgery, University of Pittsburgh Medical Center, Pittsburgh, PA
4. Department of Otolaryngology– Head and Neck Surgery, Neuroscience Institute & Brain Tumor Center, Santa Monica, CA
5. and Department of Neurological Surgery, University of North Carolina–Chapel Hill, Chapel Hill, NC
6. and Department of Ophthalmology, University of Pittsburgh Medical Center, Pittsburgh, PA
7. and the Department of Neurological Surgery, Neuroscience Institute & Brain Tumor Center, Santa Monica, CA