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Journal Article THE CLINICAL TRIAL Get access A. BRADFORD HILL, Ph.D. D.Sc. A. BRADFORD HILL, Ph.D. D.Sc. Search for other works by this author on: Oxford Academic PubMed Google Scholar British Medical Bulletin, Volume 7, Issue 4, 1951, Pages 278–282, https://doi.org/10.1093/oxfordjournals.bmb.a073919 Published: 01 April 1951
A. BRADFORD HILL (Mon,) studied this question.