| Health / Medical Topics |
Substance Use Route of Administration
The method a substance was introduced to a subject. (NCI Thesaurus)
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The literal identifier of the substance in use.
The rationale why substance use data was not obtained.
An indication or description regarding an episode of substance usage.
An indication or description that an individual's substance usage status is never, current, or former.
An indication or description of a change in substance usage.
A character or string that represents a substance usage group.
