Abstract
Lemmens et al1 were unable to validate several prediction models of stroke recurrence after transient ischemic attack (TIA) or minor stroke and suggest that methodological differences between studies explain the variation. However, many of the prediction tools were evaluated in settings that differed from the ones in which they were originally validated. We suspect that this change in intended use is why the performance of the tools was inconsistent at best. One of the studies cited relies on application of brain and carotid imaging in …
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