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. 2016 Mar 3;11(3):e0150526. doi: 10.1371/journal.pone.0150526

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© 2016 Sülsen et al

This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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Fig 7 — The fractional inhibitory concentrations (FICs) were calculated as the ratio between the IC₅₀ of one compound in combination and the IC₅₀ of the compound alone. The FIC index (FICI) for the two compounds was determined as the FIC of Psi plus the FIC of Psi C. FICI values between 0.5 and 4.0 indicate no interaction between PsiC and Psi.