TY  - RPRT
TI  - A comparative study of four different bronchial challenge tests.
AU  - L Haugaard
AU  - M Iversen
AU  - R Dahl
PY  - 1992
DO  - 10.1111/j.1398-9995.1992.tb00954.x
UR  - https://pubmed.ncbi.nlm.nih.gov/1514663/
ID  - 1514663
ER  -