Bronchial Biopsy: The investigator will collect five lung (bronchial) specimens (1-2 cubic millimeters each) from three zones of the participant's airway which will be individually coded, and stored for the computer image analysis of TRPV1 in the investigator's laboratory. Following analysis the samples will be destroyed. The results of the analysis cannot be used for determining a clinical diagnosis. Therefore, the investigator will not provide any findings to either the participant or their physician.