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2. Multianalyte testing;Kricka;Clin Chem,1992
3. Clinical experience with the triple test for Down's syndrome screening;Thornton;J Perinat Med,1991
4. Appraisal of a new scheme for prenatal screening for Down's syndrome;Sheldon;Br Med J,1991
5. Simultaneous detection of antibodies to HTLV-I and HIV-1 by chemiluminescent enzyme immunoassay;Yamamoto;Clin Chem,1991