TY  - RPRT
TI  - Stable chronic obstructive pulmonary disease.
AU  - H A Kerstjens
PY  - 1999
DO  - 10.1136/bmj.319.7208.495
UR  - https://pubmed.ncbi.nlm.nih.gov/10454405/
ID  - 10454405
ER  -