['chronic obstructive pulmonary disease, copd']
['qbw251', 'placebo']

        Inclusion Criteria: Must have a diagnosis of GOLD II-III chronic obstructive pulmonary
        disease (COPD); Must have clinical diagnosis of chronic bronchitis; Must be either a
        current smoker (smoked ≤ 1 pack per day on average for the last 3 months with at least a 10
        pack year smoking history) OR an ex-smoker with at least a 10 pack year smoking history;
        Exclusion Criteria: Must not be receiving chronic, daily, systemic steroids; Must not have
        severe emphysema (determined by HRCT); Must not have had a COPD exacerbation or respiratory
        tract infection requiring antibiotics or oral steroids or hospitalization within 6 weeks of
        screening; Must not be pregnant or nursing or a woman of child bearing potential; Other
        protocol-defined inclusion/exclusion criteria may apply
      