Effects of Home Air Purifiers in the Quality of Life of Patients With Chronic Obstructive Pulmonary Disease in Mexico City: : A Phase III, Single-Center, Triple-Blinded, Randomized Controlled Trial (GREAT-COPD). PPCR 2022, 8 (1), 9-15. https://doi.org/10.21801/ppcrj.2022.81.2.