Chest Chest Natural Course of the Diffusing Capacity of the Lungs for Carbon Monoxide in COPD Casanova Ciro Gonzalez-Dávila Enrique Martínez-Gonzalez Cristina Cosio Borja G. Fuster Antonia Feu Nuria Solanes Ingrid Cabrera Carlos Marin José M. Universidad de Zaragoza 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. 2021 research-article