| http://www.w3.org/ns/prov#value | - Such an apparatus as is illustrated by FIGS. 2 and 3 is eminently suited to, such as for example, the screening and isolation of foetal trophoblasts from maternal blood, an appropriate membrane/filter being employed that is gel coated, the blood sample being applied to the gel-coated side, and the membrane/filter together with each collection chamber being further treated to render it non-stick, i
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