Patients with COPD hospitalized due to COVID-19 in Spain: a comparison between the first and second wave

1. Gómez-Antúnez, M.
2. Muiño-Míguez, A.
3. Bacete-Cebrián, M.
4. Rubio-Rivas, M.
5. Lebrón Ramos, J.M.
6. de Cossío Tejido, S.
7. Peris-García, J.
8. López-Caleya, J.F.
9. Casas-Rojo, J.M.
10. Millán Núñez-Cortés, J.