Instead, small, case-control degree can be at the mercy of choice prejudice

Instead, small, case-control degree can be at the mercy of choice prejudice We also found no evidence of a higher risk of COPD among African-Americans in contrast to a case-control study of 70 cases of early-onset COPD,8 a retrospective review of 160 patients presenting for lung volume reduction surgery,9 and a prospective study of 50 …

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