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Effects of ATRA on the viability of IPEC-J2 cells. IPEC-J2 cells were treated with various concentrations of ATRA (0, 1, 10, 20, 40, 60, 80, 100 and 200 μM) for 48 h. Cell viability was measured by the CCK-8 assay. Data are presented as means ± SEM (n = 8). ***P < 0.001 compared with the control group.
