TY  - RPRT
TI  - Spirometry in young children.
AU  - I Steenbruggen
AU  - R J Roorda
PY  - 2004
DO  - 10.1183/09031936.03.00104403
UR  - https://pubmed.ncbi.nlm.nih.gov/14738253/
ID  - 14738253
ER  -