The need for epidemiologic theory.
Krieger
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N
Department of Health and Social Behavior, Harvard School of Public Health, Boston, MA 02115, USA.
Zierler
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S
D004812:Epidemiologic Methods; D004813:Epidemiology / Q000639:trends; D006801:Humans; D008403:Mass Screening; D008962:Models, Theoretical; D011634:Public Health / Q000639:trends; D012941:Social Responsibility