TY  - RPRT
TI  - Asthma as a risk factor for COPD in a longitudinal study.
AU  - Graciela E Silva
AU  - Duane L Sherrill
AU  - Stefano Guerra
AU  - Robert A Barbee
PY  - 2004
DO  - 10.1378/chest.126.1.59
UR  - https://pubmed.ncbi.nlm.nih.gov/15249443/
ID  - 15249443
ER  -