TY  - RPRT
TI  - Methacholine inhalation challenge.
AU  - P D Scanlon
AU  - K C Beck
PY  - 1994
DO  - 10.1016/s0025-6196(12)61382-2
UR  - https://pubmed.ncbi.nlm.nih.gov/7967768/
ID  - 7967768
ER  -