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Directionality, timing, and sample selection in epidemiologic research design.

Kramer, M S

Directionality, timing, and sample selection in epidemiologic research design. [electronic resource] - Journal of clinical epidemiology 1989 - 827-8 p. digital

Publication Type: Journal Article

ISSN: 0895-4356

Standard No.: 10.1016/0895-4356(89)90094-2 doi

Subjects--Topical Terms:
Epidemiologic Methods
Research Design
Sampling Studies

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