an acute infarct in a defined location in 85 of the 100 cases that had non-specific/unspecified subcodes: 45 anterior circulation strokes (27 MCA, 9 ACA , 9 carotid), 40 posterior circulation strokes (17 PCA, 11 basilar, 6 cerebellar, 6 vertebral), and 15 with no infarct on imaging. ...