TY  - RPRT
TI  - Methacholine challenge: comparison of two methods.
AU  - Donald W Cockcroft
AU  - Beth E Davis
AU  - David C Todd
AU  - Audrey J Smycniuk
PY  - 2005
DO  - 10.1378/chest.127.3.839
UR  - https://pubmed.ncbi.nlm.nih.gov/15764765/
ID  - 15764765
ER  -