TY  - RPRT
TI  - [Difficult asthma: what are the main obstacles?].
AU  - P Chanez
PY  - 2004
DO  - 10.1016/s0761-8425(04)71262-0
UR  - https://pubmed.ncbi.nlm.nih.gov/15260063/
ID  - 15260063
ER  -