A pilot study to estimate incidence of guanidinoacetate methyltransferase deficiency in newborns by direct sequencing of the GAMT gene von Mercimek-Mahmutoglu, S., Pop, A., Kanhai, W., Fernandez Ojeda, M., Holwerda, U., Smith, D., Loeber, J.G., Schielen, P.C.J.I., Salomons, G.S.

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Longitudinal trends in fetoplacental biochemical markers, uterine artery pulsatility index and maternal blood pressure during the first trimester of pregnancy von Wortelboer, E. J., Koster, M. P. H., Kuc, S., Eijkemans, M. J. C., Bilardo, C. M., Schielen, P. C. J. I., Visser, G. H. A.

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Modeling Down syndrome screening performance using first‐trimester serum markers von Koster, M. P. H., Wortelboer, E. J., Stoutenbeek, P., Visser, G. H. A., Schielen, P. C. J. I.

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First‐trimester placental protein 13 and placental growth factor: markers for identification of women destined to develop early‐onset pre‐eclampsia von Wortelboer, EJ, Koster, MPH, Cuckle, HS, Stoutenbeek, Ph, Schielen, PCJI, Visser, GHA

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Quality of nuchal translucency measurements in The Netherlands: a quantitative analysis von Koster, M. P. H., Wortelboer, E. J., Engels, M. A. J., Stoutenbeek, P. H., Elvers, L. H., Visser, G. H. A., Schielen, P. C. J. I.

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Bead-based multiplexed immunoassays to identify new biomarkers in maternal serum to improve first trimester Down syndrome screening von Koster, M. P. H., Pennings, J. L. A., Imholz, S., Rodenburg, W., Visser, G. H. A., de Vries, A., Schielen, P. C. J. I.

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First-trimester Down syndrome screening performance in the Dutch population; how to achieve further improvement? von Wortelboer, E. J., Koster, M. P. H., Stoutenbeek, Ph, Elvers, L. H., Loeber, J. G., Visser, G. H. A., Schielen, P. C. J. I.

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Performance of first-trimester serum screening for trisomy 21 before and from 11 + 0 weeks of gestational age in The Netherlands von Kuc, S., Koster, M. P. H., Visser, G. H. A., Schielen, P. C. J. I.

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Proteomics and Down syndrome screening: a validation study von Koster, M. P. H., Pennings, J. L. A., Imholz, S., Rodenburg, W., Visser, G. H. A., de Vries, A., Schielen, P. C. J. I.

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ADAM12s as a first-trimester screening marker of trisomy von Wortelboer, E. J., Linskens, I. H., Koster, M. P. H., Stoutenbeek, P., Cuckle, H., Blankenstein, M. A., Visser, G. H. A., van Vugt, J. M. G., Schielen, P. C. J. I.

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Multi-centre first-trimester screening for Down syndrome in the Netherlands in routine clinical practice von Schielen, P. C. J. I., van Leeuwen-Spruijt, M., Belmouden, I., Elvers, L. H., Jonker, M., Loeber, J. G.

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Distributions of current and new first-trimester Down syndrome screening markers in twin pregnancies von Koster, M. P. H., Wortelboer, E. J., Stoutenbeek, Ph, Visser, G. H. A., Schielen, P. C. J. I.

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Prediction of macrosomia at birth in type‐1 and 2 diabetic pregnancies with biomarkers of early placentation von Kuc, S, Wortelboer, EJ, Koster, MPH, de Valk, HW, Schielen, PCJI, Visser, GHA

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Lack of standardization in determining gestational age for prenatal screening von Koster, M. P. H., Van Leeuwen‐Spruijt, M., Wortelboer, E. J., Stoutenbeek, P., Elvers, L. H., Loeber, J. G., Visser, G. H. A., Schielen, P. C. J. I.

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Trisomy 18 and 13 screening: consequences for the Dutch Down syndrome screening programme von Koster, M. P. H., Stoutenbeek, P., Visser, G. H. A., Schielen, P. C. J. I.

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Fifteen years of triple tests in The Netherlands; the life cycle of a screening test von Wortelboer, E. J., Koster, M. P. H., Stoutenbeek, Ph, Loeber, J. G., Visser, G. H. A., Schielen, P. C. J. I.

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Dried blood spot measurement of pregnancy-associated plasma protein A (PAPP-A) and free β-subunit of human chorionic gonadotropin (β-hCG) from a low-resource setting von Browne, J. L., Schielen, P. C. J. I., Belmouden, I., Pennings, J. L. A., Klipstein-Grobusch, K.

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First-trimester serum PAPP-A and fβ-hCG concentrations and other maternal characteristics to establish logistic regression-based predictive rules for adverse pregnancy outcome von van Ravenswaaij, R., Tesselaar-van der Goot, M., de Wolf, S., van Leeuwen-Spruijt, M., Visser, G. H. A., Schielen, P. C. J. I.

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Placental protein 13 as a first trimester screening marker for aneuploidy von Koster, M. P. H., Wortelboer, E. J., Cuckle, H. S., Stoutenbeek, Ph, Visser, G. H. A., Schielen, P. C. J. I.

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Relationship between neonatal screening results by HPLC and the number of α-thalassaemia gene mutations; consequences for the cut-off value von Bouva, M J, Sollaino, C, Perseu, L, Galanello, R, Giordano, P C, Harteveld, C L, Cnossen, M H, Schielen, P C J I, Elvers, L H, Peters, M

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