DOI: 10.1055/s-00000089

Ultraschall in der Medizin - European Journal of Ultrasound

References

Eichhorn KH, Schramm T, Bald R. et al.
DEGUM grade I quality standards in obstetric ultrasound diagnosis during the 19th-22nd week of pregnancy. 
Ultraschall in Med 2006; 27: 185-187  

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