Fig. 3
Group mean ± S.E. changes in concentrations of metals and trace elements plotted as a percent of filtered air control levels following Fe exposure (left 3 panels) or Fe + SO2 exposure (right 3 panels) for females (top row) and males (bottom row) in lung (first panel), olfactory bulb (middle panel) and frontal cortex (rightmost panels). * = significantly different from filtered air control; ~  = marginally different from filtered air control; n = 4/group