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Comment
. 1996 Dec 1;125(11):941.
doi: 10.7326/0003-4819-125-11-199612010-00024.

Bias in observational studies of treatment

D H Osmond, E Charlebois, A R Moss
Comment

Bias in observational studies of treatment

D H Osmond et al. Ann Intern Med. .
No abstract available

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