highly significantp < 0.001
A significant decrease was observed within 6 hr with the lowest F − dose tested (0.125 mM F − ; p < 0.01) and became highly significant ( p < 0.001) for each of the F − concentrations > 0.125 mM.
A significant decrease was observed within 6 hr with the lowest F − dose tested (0.125 mM F − ; p < 0.01) and became highly significant ( p < 0.001) for each of the F − concentrations > 0.125 mM.