| http://www.w3.org/ns/prov#value | - A quality control material comprising, one, or more than one substance that mimics two, or more than two analytes in a sample selected from the group consisting of plasma, serum, synovial fluid, cerebrospinal fluid, urine, mucus, lymphatic fluid, feces, semen, and any combination thereof, wherein said one, or more than one substance is a synthetic substance.
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