Baseline Forced Expiratory Volume in 1 Second (FEV1) \< 80% of predicted, with reversibility (10%) on post-bronchodilator spirometry
Adults, 18-75 years of age
Long-term inhaled controller medication consisting of or including an Inhaled corticosteroids (ICS) at a steady dose for at least 3 months before enrollment
You may not be if
Current cigarette smoking or a past history of \>10 pack-year smoking
Current nicotine vaping
Pregnant and breast-feeding women
Respiratory infection within 4 weeks of proposed study date
Forced Expiratory Volume in 1 Second (FEV1) \< 50%
