TY  - RPRT
TI  - Pregnancy after aortic valve prothesis.
AU  - H Hedstrand
AU  - I Cullhed
PY  - 1968
DO  - 10.1016/s0140-6736(68)91087-8
UR  - https://pubmed.ncbi.nlm.nih.gov/4176168/
ID  - 4176168
ER  -