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Cytotoxicity of free Dox and RBHP(Dox) at (A) 4 h and (B) 24 h.
Note: HeLa cell viability was measured by the MTS assay.
Abbreviations: h, hours; Dox, doxorubicin; RBHPs, raspberry-like hydrogel particles; MTS, methyl tetrazolium salt; RBHP(Dox), Dox encapsulated in RBHP.
