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Title: Pneumonia is most frequently caused by ________. Post by: austinderrick2 on Dec 3, 2017 Pneumonia is most frequently caused by ________.
a. inhaled foreign substances such as vomit b. asthma c. smoking d. a bacterium or a virus Title: Re: Pneumonia is most frequently caused by ________. Post by: Solen on Dec 3, 2017 d
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