TY  - GEN
AU  - Merz,E
TI  - [Certified sonographic screening and certified biochemical test in early pregnancy]
SN  - 0172-4614
PY  - 2002///1024
KW  - Certification
KW  - Female
KW  - Humans
KW  - Pregnancy
KW  - Quality Control
KW  - Ultrasonography, Prenatal
KW  - standards
N1  - Publication Type: Editorial
UR  - https://doi.org/10.1055/s-2002-33153
ER  -