Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Viability of 4T1 cells incubated with CaF2:Y,Gd,Nd NPs at increasing concentrations (0−2 mg/mL) after (a) 24; (b) 48; and (c) 72 h assessed by MTS assay. All data are expressed as mean ± SD from three independent experiments. Statistical significance was calculated using the t-test, by comparing experimental groups to the control group (* p < 0.05, ** p < 0.01).
