TY  - RPRT
TI  - Environmental factors relevant to difficult asthma.
AU  - Sejal Saglani
AU  - Sheila A McKenzie
PY  - 2002
DO  - 10.1016/s1526-0542(02)00187-2
UR  - https://pubmed.ncbi.nlm.nih.gov/12376062/
ID  - 12376062
ER  -