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. 2019 Jun 10;14(6):e0218123. doi: 10.1371/journal.pone.0218123

Fig 5. Apical iron uptake for Caco-2 cells after a first (0-15 min) and second (15-30 min) iron challenges with 20 μM iron in the apical medium.

Fig 5

(∘): the average value of the sample and error bars indicate its standard deviation. ♦ P < 0.05; ⊚ P < 0.25.