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12. Low levels of maternal serum PAPP-A in early pregnancy and the risk of adverse outcomes. Spencer CA, Allen VM, Flowerdew G, Dooley K, Dodds L. Prenat Diagn; 2008 Nov; 28(11):1029-36. PubMed ID: 18925584 [Abstract] [Full Text] [Related]
13. First-trimester maternal placental protein 13 levels in pregnancies resulting in adverse outcomes. Cowans NJ, Spencer K, Meiri H. Prenat Diagn; 2008 Feb; 28(2):121-5. PubMed ID: 18186153 [Abstract] [Full Text] [Related]