TY  - RPRT
TI  - Children with difficult asthma: a practical approach.
AU  - D N Payne
AU  - I M Balfour-Lynn
PY  - 2001
DO  - 10.1081/jas-100000106
UR  - https://pubmed.ncbi.nlm.nih.gov/11392359/
ID  - 11392359
ER  -