TY  - RPRT
TI  - Difficult asthma.
AU  - G Garcia
AU  - M Adler
AU  - M Humbert
PY  - 2003
DO  - 10.1034/j.1398-9995.2003.02171.x
UR  - https://pubmed.ncbi.nlm.nih.gov/12622741/
ID  - 12622741
ER  -