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| Emphysema is a chronic obstructive pulmonary disease most often caused by exposure to tobacco smoke or toxic material. Learn more about emphysema, including symptoms and... |
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| Uploaded: November 30, 1999 at 12:00 am |
| Author: livestrong |
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| Length: 01:01 |
| Rating: 5.0 |
| Views: 898 |
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| Tags: emphysema copd |
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