TY  - RPRT
TI  - COPD: exacerbation.
AU  - N F Voelkel
AU  - R Tuder
PY  - 2000
DO  - 10.1378/chest.117.5_suppl_2.376s
UR  - https://pubmed.ncbi.nlm.nih.gov/10843980/
ID  - 10843980
ER  -