DOI: 10.1055/s-00000020

Geburtshilfe und Frauenheilkunde

References

Saari-Kemppainen A, Karjaleinen O, Ylosralo P, Heinonen OP.
Ultrasound screening and perinatal mortality: Controlled trial of systematic one-stage screening in pregnancy. The Helsinki Ultrasound Trial. 
Lancet 1990; 336: 387-391  

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