RT Journal Article SR Electronic T1 Air quality in Mexico City during the COVID-19 lockdown possibly decreased COPD exacerbations JF ERJ Open Research JO erjor FD European Respiratory Society SP 00183-2022 DO 10.1183/23120541.00183-2022 VO 8 IS 4 A1 Montiel-Lopez, Francisco A1 Rodríguez-Ramírez, Daniela A1 Cassou-Martínez, Maricruz A1 Miranda-Márquez, María Cristina A1 González-González, Claudia A1 Sansores, Raúl H. A1 Mayar-Maya, María Eugenia A1 Pérez-Padilla, Rogelio A1 Robles-Hernández, Robinson Emmanuel A1 Thirion-Romero, Ireri A1 Pérez-Bautista, Oliver A1 Ramírez-Venegas, Alejandra YR 2022 UL http://openres.ersjournals.com/content/8/4/00183-2022.abstract AB