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. 2022 Sep 15;373:132638. doi: 10.1016/j.snb.2022.132638

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Fig. 3 — Pixel intensity as a function of the protein concentration after adding diluted plasma samples from ICU (red) or ward patients (black) to gold nanoparticles. Dotted lines are a guide to eye. PI_min: minimum value of pixel intensity; C_PImin: protein concentration at PI_min; C_1.75: indicates that the protein concentration is 1.75 × 10^-4 g·dL^-1.