DOI: 10.1055/s-00000089

Ultraschall in der Medizin - European Journal of Ultrasound

References

Bahado-Singh R, Deren O, Oz U. et al.
An alternative for women initially declining genetic amniocentesis: individual Down syndrome odds on the basis of maternal age and multiple ultrasonographic markers. 
Am J Obstet Gynecol 1998; 179: 514-519  

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