Trends of COPD in Spain: Changes Between Cross Sectional Surveys 1997, 2007 and 2017 Elena García Castillo; Tamara Alonso Pérez; Adrián Peláez; Patricia Pérez González; Marc Miravitlles; Inmaculada Alfageme; Ciro Casanova; Borja G. Cosío; Pilar de Lucas; Francisco García-Río; José Miguel Rodríguez González-Moro; Juan José Soler-Cataluña; Guadalupe Sánchez; Joan B. Soriano; Julio Ancochea;

The Emergence of COVID-19 as a Cause of Death in 2020 and its Effect on Mortality by Diseases of the Respiratory System in Spain: Trends and Their Determinants Compared to 2019 Joan B. Soriano; Adrián Peláez; Esteve Fernández; Laura Moreno; Julio Ancochea;

¿Empyema necessitatis caused by Actinomyces meyeri¿ Laura Castellanos López; Elena García Castillo; Rosa María Girón Moreno;