Fig. 2

Patient selection process. COPD, chronic obstructive pulmonary disease; CODA, COPD in Dusty Areas; CT, computed tomography; FEV1; forced expiratory volume in one second; PRM, parametric response mapping.

Patient selection process. COPD, chronic obstructive pulmonary disease; CODA, COPD in Dusty Areas; CT, computed tomography; FEV1; forced expiratory volume in one second; PRM, parametric response mapping.