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Abnormal yawning and clinical and neuroradiological stroke parameters. Correlations of the period length with abnormal yawning (duration of yawning [h]) with: (a) ADC values as neuroradiological surrogate marker of stroke severity, and (c) NIHSS as clinical marker of stroke severity. No correlations were found between duration of yawning and (b) neuroradiological stroke volume, and (d) mRS d7–14 as clinical outcome marker, determined between days 7–14 after stroke onset
