| http://www.w3.org/ns/prov#value | - And so it would bring up a very important point that needs to be made here, namely that in the past or when you look at the markers that we have available at the present time such as PSA, prostate-specific antigen, or CA125, or CA19-9, those are markers for different types of cancers, well, they don???t perform as well as we would like them to perform.
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