Preferred Term:
retrospective studies
Definition:
A kind of nonexperimental study in which all the phenomena investigated occurs prior to the onset of the study.
Concept Schemes:
NALT Core
NALT Full
NALT Full
Broader Concept:
URI:
https://lod.nal.usda.gov/nalt/137083
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RDF/XMLCreated 2010-09-01, last modified 2017-07-06
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