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Relative amounts of HCA accumulated in U937/PMA cells after 24 h of exposure to free HCA (f-HCA) and HCA-loaded liposomes (Lip-HCA) (50 and 500 μM). Results are presented as means ± SD (n = 3). ### p < 0.001 (50 μM f-HCA vs. 50 μM Lip-HCA, and 500 μM f-HCA vs. 500 μM Lip-HCA).
