Surgical Management of PICA Aneurysm and Incidental Facial Nerve Schwannoma: Case Report - Bian, Liu-Guan; Sun, Qing-Fang; Tirakotai, Wuttipong; Zhao, Wei-Guo; Bertalanffy, Helmut; Shen, Jian-Kang (Skull Base, 2007)