Comorbidities and risk of mortality in patients with chronic obstructive pulmonary disease

1. Divo, M.
2. Cote, C.
3. De Torres, J.P.
4. Casanova, C.
5. Marin, J.M.
6. Pinto-Plata, V.
7. Zulueta, J.
8. Cabrera, C.
9. Zagaceta, J.
10. Hunninghake, G.
11. Celli, B.