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Back to Journals » International Journal of Chronic Obstructive Pulmonary Disease » Volume 3 » Issue 1
Original Research
Effect of add-on therapy of tiotropium in COPD treated with theophylline
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| 6,580 | Dovepress* | 6,580+ | 1,887 | 8,467 | |
| Totals | 6,580 | 1,887 | 8,467 | ||
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*Since 7 March 2008 +Since July 2016 |
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