The bar graph in Fig. 7b shows the densitometric analysis of the specific bands of osteogenic-related markers, COL1A1, RUNX-2 and OPN (COL1A1 expression of sham OM vs ELF-EMF OM, ***p < 0.001; RUNX-2 expression of sham OM vs ELF-EMF OM, ***p < 0.001; OPN expression of sham OM vs ELF-EMF OM, **p < 0.01). The gene discussed is SPP1; the disease is ocular melanoma.