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. Author manuscript; available in PMC: 2020 Jun 4.
Published in final edited form as: Anal Chem. 2019 May 14;91(11):7394–7402. doi: 10.1021/acs.analchem.9b01284

Figure 4.

Figure 4.

Calibration curves for ELISA tip colorimetric multiplexed detection of (A) PSA, (B) VEGF, (C) IGF-1, and ((D) CD-14. Absorbance was measured at 450 nm in a plate reader (n = 4).