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Substance Use Group Identifier
A character or string that represents a substance usage group. (NCI Thesaurus)
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A characterization of the relationship of a substance use conclusion point in time to a reference point in time.
The day of the week substance usage concluded.
The date and time substance usage has concluded.
The stop date of the substance usage.
The unit of measure for the period of time over which substance usage occurs.
The length of time that substance usage occurs.
