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As an alternative, short, case-handle knowledge will likely be susceptible to choices bias

As an alternative, short, case-handle knowledge will likely be susceptible to choices bias 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 step step step one60 patients presenting for lung volume reduction surgery,9 and a prospective study of 50 African-Americans...