- Completed research bronchoscopy while on current dose of daily fluticasone and salmeterol within 4 weeks of meeting other inclusion criteria. Note: many patients in the ROLD clinic require a bronchoscopy to confirm the diagnosis of asthma and exclude other diagnosis (e.g., sarcoidosis). These patients are asked to participate in a research protocol (separate from this proposal) that allows investigators to collect additional samples (endobronchial biopsies, bronchoalveolar lavage fluid, endobronchial brushings) at the end of the clinical portion of the bronchoscopy {IRB protocol # 15361A entitled, "Airway inflammation in refractory obstructive lung disease (ROLD): understanding markers of inflammation and remodeling"}. This protocol was recently submitted to the IRB in March 2007.