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Causation and Causal Inference in Epidemiology
Kenneth J. Rothman, DrPH and
Sander Greenland, MA, MS, DrPH, C Stat
Kenneth J. Rothman is with the Boston University Medical Center, Boston, Mass. Sander Greenland is with the University of California, Los Angeles.

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FIGURE 1— Three sufficient causes of disease.
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Copyright © 2005 by the American Public Health Association
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