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SIR,-In your leading article on "Clofibrate in Ischaemic Heart Disease" (25 December, p. 765) mention is made of the numbers and percentages of patients in the clofibrate and placebo groups who "died suddenly from myocardial infarction." This statement embraces both sudden deaths and fatal myocardial infarction. In the analysis of the results we deliberately distinguished sudden deaths from fatal myocardial infarcts and believe that this distinction may be important in such clinical trials.-We are, etc.,
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R. D. Thornes (1972) studied this question.
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