TY  - RPRT
TI  - How is difficult asthma managed?
AU  - N J Roberts
AU  - D S Robinson
AU  - M R Partridge
PY  - 2006
DO  - 10.1183/09031936.06.00003706
UR  - https://pubmed.ncbi.nlm.nih.gov/16807267/
ID  - 16807267
ER  -