Small Particle Inhaled Steroids in Refractory Steroid-responsive Asthma

In patients with poorly controlled asthma with evidence of persistent eosinophilic inflammation can the addition of extra inhaled corticosteroid that targets the distal airways improve asthma control and reduce the eosinophilic airway inflammation? The primary endpoint will be the difference in sputum eosinophil count between active and placebo groups at 8 weeks.