TY  - RPRT
TI  - Spirometry: quality control and reproducibility criteria.
AU  - R O Crapo
PY  - 1991
DO  - 10.1164/ajrccm/143.6.1212
UR  - https://pubmed.ncbi.nlm.nih.gov/2048802/
ID  - 2048802
ER  -