Affiliation: | (1) Department of Radiology, Ehime University School of Medicine, Shitsukawa, Shigenobucho, Onsengun, 791-0295, Onsengun Ehime, Japan;(2) Department of Neurosurgery, Ehime University School of Medicine, Shitsukawa, Shigenobucho, Onsengun, 791-0295 Ehime, Japan |