Elias et al., "First trimester prenatal diagnosis of trisomy 21 in fetal cells from maternal blood" The Lancet: Letters to the Editor, vol. 340, p. 1033, Oct. 24, 1992. |
Grozdea et al., "Cytochemical and biochemical studies on neutrophil alkaline phosphatase in parents of trisomy 21 children" Human Genetics, vol. 67, pp. 313-316, 1984. |
Schroder et al., "Fetal Leukocytes in the Maternal Circulation After Delivery" Transplantation, vol. 17, No. 4, pp. 346-354, Apr. 1974. |
Wessman et al., "Fetal Granulocytes in Maternal Venous Blood Detected by in situ Hybridization" Prenatal Diagnosis, vol. 12, pp. 993-1000, 1992. |
Wachtel et al Human Reproduction (1991) 6:1466-1469. |
Bianchi et al Proc Natl Acad Sci, USA (1990) 87:3279-3283. |
Wessman et al Prenatal Diagnosis (1992, Dec). 12:993-1000. |
Cullen et al Biochemical Medicine (1980) 23: 133-143. |
Brison et al, Molec & Cellular Biology (1982) 2: 578-587. |
Bianchi et al, Prenatal Diagnosis (Apr. 1993) 13: 293-300. |
Klinger et al Am J Hum Genetics (1992) 51:55-65. |