Repository of Research and Investigative Information
Shahid Sadoughi University of Medical Sciences
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(2020) Fine-tuning ofroutine combined first- trimester screening: The ratio of serum-free- beta-human chorionic gonadotropin (fβ-hCG) to pregnancy-associated plasma protein-A (PAPP-A) could improve performance of Down syndrome screening program, a retrospective cohort study in Iran. Human antibodies. ISSN 1875-869X