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Figure 2 Sensitivity and precision of various cardiac troponin I (cTnI) assays as provided by measurements made by the manufacturers from pools provided by the International Federation for Clinical Chemistry committee. (A to G) Increasing concentrations of cTnI. Note that many assays are incapable of detecting the lower values with reasonable precision. Reprinted, with permission, from Panteghini et al. (13). CV = coefficient of variation.