Back to Journals » International Journal of Chronic Obstructive Pulmonary Disease » Volume 10 » Issue 1
Original Research
Smoking duration, respiratory symptoms, and COPD in adults aged ≥45 years with a smoking history
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69,354 | Dovepress* | 19,154+ | 2,119 | 21,273 | |
PubMed Central* | 50,200 | 2,378 | 52,578 | ||
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4 | 0 | 0 | 0 | 1 | 3 |
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