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Figure 3: Results from the six layers of the primary auditory cortex. Ratio of TUNEL-positive grids to all grids within the six histological layers of the primary auditory cortex (AI-1 to AI-6). Compared to unexposed controls (white) no statistically significant differences were found in either the 24-h group (light gray) or 7-day group (dark gray). The decrease in the 14-day group (black) compared to the 7-day group (dark gray) in layer 1 lost statistical significance due to multiple comparison and was therefore marked with asterisk in parenthesis (*)

Figure 3: Results from the six layers of the primary auditory cortex. Ratio of TUNEL-positive grids to all grids within the six histological layers of the primary auditory cortex (AI-1 to AI-6). Compared to unexposed controls (white) no statistically significant differences were found in either the 24-h group (light gray) or 7-day group (dark gray). The decrease in the 14-day group (black) compared to the 7-day group (dark gray) in layer 1 lost statistical significance due to multiple comparison and was therefore marked with asterisk in parenthesis (<sup>*</sup>)