COPD and declining FEV1--time to divide and conquer?
- PMID: 18836214
- DOI: 10.1056/NEJMe0807387
COPD and declining FEV1--time to divide and conquer?
Comment on
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A 4-year trial of tiotropium in chronic obstructive pulmonary disease.N Engl J Med. 2008 Oct 9;359(15):1543-54. doi: 10.1056/NEJMoa0805800. Epub 2008 Oct 5. N Engl J Med. 2008. PMID: 18836213 Clinical Trial.
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