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The major risk factor for chronic bronchitis is A. cigarette smoking. B. family history. C. dust in the air. D. previous allergies.
The major risk factor for chronic bronchitis is cigarette smoking.
rdsa77|Points 8463|
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Asked 10/4/2010 9:11:59 AM
Updated 11/1/2017 2:39:57 AM
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This answer has been confirmed as correct and helpful.
Edited by yumdrea [11/1/2017 2:39:52 AM], Confirmed by yumdrea [11/1/2017 2:39:57 AM]
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Heart attack
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Updated 3/13/2015 3:40:17 PM
1 Answer/Comment

A heart attack is a serious medical emergency in which the supply of blood to the heart is suddenly blocked, usually by a blood clot.

Added 3/13/2015 3:40:13 PM
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