[1]Atlantic Lateral Skull Base Clinic, Division of Neurosurgery, Dalhousie University, QEII Halifax Infirmary Site, Halifax NS B3H 3A7, Canada;
[2]Capital District Health Authority, QEII Hali-fax Infirmary Site, 3rd Floor, Division of Neurosurgery, Halifax NS B3H 3A7, Canada;
[3]Department of Pharmacology, Dalhousie Uni-versity, Nova Scotia B3H 4R2, Canada;
[4]Division Otolaryngology, Dalhousie University, QEII Health Sciences Centre, Halifax NS B3H 2Y9, Canada;
[5]Division of Neurosurgery, Dalhousie University, Halifax Infirmary Site, QEII Health Sciences Centre, Halifax NS B3H 3A7, Canada;
[6]Department of Anesthesia and Pain Manage-ment, Dalhousie University, Halifax NS B3H 2Y9, Canada;
[4]Division Otolaryngology, Dalhousie University, QEII Health Sciences Centre, Halifax NS B3H 2Y9, Canada;