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 - Soriano, Joan B; Pelaez, Adrian; Fernandez, Esteve; Moreno, Laura; Ancochea, Julio (Archivos De Bronconeumologia, 2022)