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Defined Observation Focal Duration
Definition 1
A quantity of time in which the observation result is held to be true. (NCI Thesaurus)
Definition 2
A quantity of time in which the observation result is held to be true. EXAMPLE(S): 2 months is the focalDuration for the question, "Have you smoked in the last 2 months?". NOTE(S): The focalDuration can be derived from the expression captured in the focalDateRange.EXPRIVLTS.DATETIME. (NCI Thesaurus/BRIDG)
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The subject of the notification.
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