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Drugs
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Written by HealthConnector
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Thursday, 25 February 2010 |
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Asthma occurs when the airways in your lungs (bronchial tubes) become inflamed and constricted. The muscles of the bronchial walls tighten, and your airways produce extra mucus that blocks your airways. -Source from Mayo Clinic |
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Last Updated ( Tuesday, 31 August 2010 )
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