In a British study around 1950, a group of 649 men with lung cancer were surveyed

In a British study around 1950, a group of 649 men with lung cancer were surveyed.?
In a British study around 1950, a group of 649 men with lung cancer were surveyed. A control group of the same size was established from a set of men who did not have lung cancer The groups were matched according to ethnicity, age, and socioeconomic status. The statistics from the survey follow.
History - 2 Answers
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1 :
yes
2 :
yes. i remember that survey.



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