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MTT-based cell viability assay for six herbal decoctions. The hepatitis C virus (HCV) host cells Huh7.5.1 were exposed to the decoction of (a) Aeginetia indica; (b) Angelica sinensis; (c) Isatis tinctoria; (d) Lycium barbarum; (e) Paeonia suffruticosa; or (f) Radix curcumae for 72 h before being assayed for cell viability. Values are mean ± SEM (standard error of the mean) summarized from three independent experiments. Estimated 50% inhibitory concentrations (IC50) in mg/mL are shown.
