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1. The category of chronic cough is typically attributed to a cough lasting more than:

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2. Which of the following is the most common cause of chronic cough?

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3. When a specific underlying etiology of chronic cough cannot be identified, initial empiric treatment trials can include any of the following oral agents except:

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4. Which of the following drug classes is most likely associated with drug-induced cough?

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5. Novel classes of agents being investigated to treat refractory chronic cough (RCC) include all of the following except:

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