TY  - RPRT
TI  - Is difficult asthma still clinically meaningful?
AU  - P Chanez
AU  - P Godard
PY  - 2006
DO  - 10.1183/09031936.00112806
UR  - https://pubmed.ncbi.nlm.nih.gov/17074916/
ID  - 17074916
ER  -