TY  - RPRT
TI  - ATS guidelines for methacholine and exercise challenge testing.
AU  - V Popa
PY  - 2001
DO  - 10.1164/ajrccm.163.1.16310b
UR  - https://pubmed.ncbi.nlm.nih.gov/11208661/
ID  - 11208661
ER  -