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Association offirst-trimester low PAPP-A levels with preterm birth |
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| Authors: | Katherine R Goetzinger Alison G Cahill George A Macones Anthony O Odibo |
| Institution: | Department of Obstetrics and Gynecology, Washington University, St. Louis, USA |
| Abstract: | |
| Keywords: | PAPP-A preterm birth free β-hCG nuchal translucency first-trimester screening |