TY  - RPRT
TI  - Asthma during pregnancy--a population based study.
AU  - B Källén
AU  - H Rydhstroem
AU  - A Aberg
PY  - 2000
DO  - 10.1023/a:1007678404911
UR  - https://pubmed.ncbi.nlm.nih.gov/10845267/
ID  - 10845267
ER  -