Fig. (2) Viability of cultured cells after 1 h exposure with ELF MF as determined with MTT assay. (A) Viability time course of control and exposed SaOS-2 cells. (B) MCF-7, SK-BR-3, and SaOS-2 viable cells immediately after MF stimulation, reported as percentage of viability of unexposed control cells. Reported values are means of three independent experiments ± standard deviations.