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HepG2 cell viability (± SEM) as assessed through modified MTT assay as a function of time [(A) 24, (B) 48 and (C) 72 h] and concentration of unformulated BA (BA), uncoated liposomes loaded with BA (Lip-BA) and chitosan-coated liposomes loaded with BA (Chit-Lip-BA) at BA concentration ranging from 0.05 to 10 mM. *P<0.001, **P<0.05; ns: not significant.
