Report copyright - Measurand characteristics & reference materials for hCG€¦ · Between-lab agreement - hCG 19 9 0 19 9 1 1 9 9 2 1 9 9 3 1 99 4 19 9 5 1 9 9 6 1 9 9 7 1 99 8 19 9 9 20 0 0 2 0 0
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