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. 2012 Mar 26;12(4):3879–3890. doi: 10.3390/s120403879

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© 2012 by the authors; licensee MDPI, Basel, Switzerland.

This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/).

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Figure 1. — Calibration curve of SPR intensity against the concentrations of fetal fibronectin (fFN) (0.5, 1, 5, 10, 50, and 100 ng/mL), with a correlation coefficient (R²) of 0.985. The SPR intensity corresponding to the fFN ELISA critical concentration of 50 ng/mL was 17 a.u.