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561 561. Roberts SH, Little E, Vaughan M, et al. Rapid prenatal diagnosis of Patau's syndrome in a fetus with an abdominal wall defect by 72 hour culture of cells from amniotic fluid. Prenat Diagn 1993; 13:971.

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568 568. Megaw JM, Priest JH, Priest RE, et al. Differentiation in human amniotic fluid cell cultures: II: Secretion of an epithelial basement membrane glycoprotein. J Med Genet 1977; 14:163.

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570 570. Priest RE, Marimuthu KM, Priest JH. Origin of cells in human amniotic fluid cultures: ultrastructural features. Lab Invest 1978; 39:106.

571 571. Priest RE, Priest JH, Moinuddin JF, et al. Differentiation in human amniotic fluid cell cultures: chorionic gonadotropin production. In Vitro 1979; 15:142.

572 572. Thakar N, Priest RE, Priest JH. Estrogen production by cultured amniotic fluid cells. Clin Res 1982; 30:888A.

573 573. O'Shannessy DJ, Priest RE, Priest JH. Metabolism of [4‐14C]androstenedione by cells cultured from human amniotic fluid. J Steroid Biochem 1984; 20:935.

574 574. Laundon CH, Priest JH, Priest RE. The characterization of hCG regulation in cultured human amniotic fluid cells. Prenat Diagn 1981; 1:269.

575 575. Laundon CH, Priest JH, Priest RE. Characterization of hCG regulation in cultured human amniotic fluid cells: II. Mechanisms for stimulation. In Vitro 1983; 19:911.

576 576. Chang HC, Jones OW. In vitro characteristics of human fetal cells obtained from chorionic villus sampling and amniocentesis. Prenat Diagn 1988; 8:367.

577 577. Whitsett CF, Priest JH, Priest RE, et al. HLA typing of cultured amniotic fluid cells. Am J Clin Pathol 1983; 79:186.

578 578. Crouch E, Bornstein P. Collagen synthesis by human amniotic fluid cells in culture: characterization of a procollagen with three identical proalpha1(I) chains. Biochemistry 1978; 17:5499.

579 579. Crouch E, Bornstein P. Characterization of a type IV procollagen synthesized by human amniotic fluid cells in culture. J Biol Chem 1979; 254:4197.

580 580. Crouch E, Balian G, Holbrook K, et al. Amniotic fluid fibronectin. Characterization and synthesis by cells in culture. J Cell Biol 1978; 78:701.

581 581. Bryant EM, Crouch E, Bornstein P, et al. Regulation of growth and gene activity in euploid hybrids between human neonatal fibroblasts and epithelioid amniotic fluid cells. Am J Hum Genet 1978; 30:392.

582 582. Johnston P, Salk D, Martin GM, et al. Cultivated cells from mid‐trimester amniotic fluids: IV. Cell type identification via one and two‐dimensional electrophoresis of clonal whole cell homogenates. Prenat Diagn 1982; 2:79.

583 583. Virtanen I, von Koskull H, Lehto VP, et al. Cultured human amniotic fluid cells characterized with antibodies against intermediate filaments in indirect immunofluorescence microscopy. J Clin Invest 1981; 68:1348.

584 584. Cremer M, Treiss I, Cremer T, et al. Characterization of cells of amniotic fluids by immunological identification of intermediate‐sized filaments: presence of cells of different tissue origin. Hum Genet 1981; 59:373.

585 585. Chen WW. Studies on the origin of human amniotic fluid cells by immunofluorescent staining of keratin filaments. J Med Genet 1982; 19:433.

586 586. Moll R, Franke WW, Schiller DL, et al. The catalog of human cytokeratins: patterns of expression in normal epithelia, tumors and cultured cells. Cell 1982; 31:11.

587 587. Ochs BA, Franke WW, Moll R, et al. Epithelial character and morphologic diversity of cell cultures from human amniotic fluids examined by immunofluorescence microscopy and gel electrophoresis of cytoskeletal proteins. Differentiation 1983; 24:153.

588 588. Hoehn H, Bryant EM, Karp LE, et al. Cultivated cells from diagnostic amniocentesis in second trimester pregnancies. II. Cytogenetic parameters as functions of clonal type and preparative technique. Clin Genet 1975; 7:29.

589 589. Regauer S, Franke WW, Virtanen I. Intermediate filament cytoskeleton of amnion epithelium and cultured amnion epithelial cells: expression of epidermal cytokeratins in cells of a simple epithelium. J Cell Biol 1985; 100:997.

590 590. Hsu LY, Kaffe S, Perlis TE. A revisit of trisomy 20 mosaicism in prenatal diagnosis – an overview of 103 cases. Prenat Diagn 1991; 11:7.

591 591. Van Dyke DL, Roberson JR, Babu VR, et al. Trisomy 20 mosaicism identified prenatally and confirmed in foreskin fibroblasts. Prenat Diagn 1989; 9:601.

592 592. Bell JE, Barron L, Raab G. Antenatal detection of neural tube defects: comparison of biochemical and immunofluorescence methods. Prenat Diagn 1994; 14:615.

593 593. Melancon SB, Lee SY, Nadler HL. Histidase activity in cultivated human amniotic fluid cells. Science 1971; 173:627.

594 594. Gerbie AB, Melancon SB, Ryan C, et al. Cultivated epithelial‐like cells and fibroblasts from amniotic fluid: their relationship to enzymatic and cytologic analysis. Am J Obstet Gynecol 1972; 114:314.

595 595. Van der Veer E, Kleijer WJ, de Josselin de Jong JE, Galjaard H. Lysosomal enzyme activities in different types of amniotic fluid cells measured by microchemical methods, combined with interference microscopy. Hum Genet 1978; 40:285.

596 596. Burton BK, Gerbie AB, Nadler HL. Biochemical and biological problems and pitfalls of cell culture for prenatal diagnosis. In: Milunsky A, ed. Genetic disorders and the fetus: diagnosis prevention, and treatment. New York: Plenum Press, 1979:369.

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