First, although there were differences in ischemic and hemorrhagic presentations between groups, differences in subsequent ischemic events or hemorrhagic stroke failed to reach significance.
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Behavior of Extracranial-to-Intracranial Extended Arterial Dissections of the Vertebral Artery.
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The sentences
In contrast to iVAD, no hemorrhagic presentations were observed for e+iVAD, along with no subsequent hemorrhagic stroke (which, however, failed to reach statistical significance).