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Examples of intra-individual variations (diamonds) in clotting time effects at RT on the serum concentrations of a C4a [1337–1350], b Des-Arg9-bradykinin, c ITIH4-22 and d ITIH4-27 in samples collected on three different days at Saltro (dark-gray), UMC (light-gray) or SMCP (black). The dotted line represents the assay’s LLOQ
