Letter: Identification of the Distal Dural Ring and Definition of Paraclinoid Aneurysms According to Bony Landmarks on 3-Dimensional Computed Tomography Angiography: A Cadaveric and Radiological Study. Issue 5 (31st July 2020) - Hsu, Sanford P C; Lin, Chun-Fu; Liao, Chih-Hsiang