The Extended Retrosigmoid Approach for High-Riding Posterior Inferior Cerebellar Artery Aneurysms—Part I: A Quantitative Anatomical Analysis of the Glossopharyngo–Cochlear Triangle - Zhao, Xiaochun Xiaochun; Meybodi, Ali; Naeem, Komal; Belyk, Engenii; Labib, Mohamed; Preul, Mark; Lawton, Michael (Journal of Neurological Surgery Part B: Skull Base, 2020)