Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) SEILER RW,Cerebral vasospasm evaluated by transcranial ultrasound correlated with clinical grade and CT visualized subarachnoid hemorrhage,J Neurosurg,,,1986,64,,594-600,https://cir.nii.ac.jp/crid/1572261551148595200,