Casanova, Ciro Gonzalez-Dávila, Enrique Martínez-Gonzalez, Cristina Cosio, Borja G. Fuster, Antonia Feu, Nuria Solanes, Ingrid Cabrera, Carlos Marin, José M. Balcells, Eva Peces-Barba, Germán de Torres, Juan P. Marín-Oto, Marta Calle, Myriam Golpe, Rafael Ojeda, Elena Divo, Miguel Pinto-Plata, Victor Amado, Carlos López-Campos, José Luis Celli, Bartolome R. Natural Course of the Diffusing Capacity of the Lungs for Carbon Monoxide in COPD Chest 10.1016/j.chest.2021.03.069 2021 2021