TY  - RPRT
TI  - Difficult asthma: defining the problems.
AU  - S C Ranganathan
AU  - D N Payne
AU  - A Jaffe
AU  - S A McKenzie
PY  - 2001
DO  - 10.1002/1099-0496(200102)31:2<114::aid-ppul1018>3.0.co;2-o
UR  - https://pubmed.ncbi.nlm.nih.gov/11180686/
ID  - 11180686
ER  -