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Summary of the number of exacerbations (ITT population): Exacerbations characterized by the number with or without a mucus sample collected within the 5 days prior or 2 days following the exacerbation. The exacerbations with a mucus sample were characterized as virus-positive and virus-negative exacerbations. Of the virus-positive exacerbations the number associated with HRV infection is shown. HRV, human rhinovirus; ITT, intent-to-treat.
