PLAT and brain ischemia: The cluster label names ordered as the number of keywords in the clusters were as follows: “neural regeneration,” “cerebral ischemia,” “stent,” “aneurysm,” “dural arteriovenous fistula,” “hyperbaric oxygen,” “moyamoya disease,” “carotid stenosis,” “tissue plasminogen activator,” “covered stent,” “smooth muscle cell,” and “cerebral blood flow.” Five names of diseases were selected as labels.