TY  - RPRT
TI  - COPD guidelines.
AU  - E F Bowen
AU  - C F Rayner
PY  - 1999
DO  - 10.1136/thx.54.7.655
UR  - https://pubmed.ncbi.nlm.nih.gov/10438304/
ID  - 10438304
ER  -