| http://www.w3.org/ns/prov#value | - metry,??? Clinical Chemistry, Vol. 38, No. 3 (1998). [0041] All of the foregoing references are hereby incorporated herein by reference. [0042] Also included in the present invention is a method of making a test tray comprising a plurality of test cells for conducting a plurality of tests on a biological fluid, the method comprising: (a) placing an aliquot of a liquid containing an internal standa
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