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  2. Effect of β blockers...
  3. Effect of β blockers in treatment of chronic obstructive pulmonary disease: a retrospective cohort study
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Research

Effect of β blockers in treatment of chronic obstructive pulmonary disease: a retrospective cohort study

BMJ 2011; 342 doi: https://doi.org/10.1136/bmj.d2549 (Published 10 May 2011) Cite this as: BMJ 2011;342:d2549
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