Table 1.

The RGR and cytotoxicity gradation of PMBCs incubated with BrTet or MNPs-Fe₃O₄ for 48 hours

Cytotoxicity gradation	RGR (%)
Band 0	≥100
Band 1	75∼99
Band 2	50∼74
Band 3	25∼49
Band 4	1∼24
Band 5	0

Notes: The RGR was calculated as follow: OD_{test cells}/OD_{negative control} × 100%. The band 0 or 1 was qualified, band 2 should be evaluated with morphology, and band 3∼5 was unqualified.²³

Abbreviations: OD, optical density; PMBCs, peripheral blood mononuclear cells; RGR, relative growth rate.