Changes in relative organ weight following a single instillation of semi-single-walled carbon nanotubes (semi-SWCNTs).

Note: Relative weight of each organ was computed using the formula (tissue weight/body weight) × 100. At each time point, the number in the exposure group was 15, and that in the control group was 3. C: Control group, T: semi-SWCNT group.

*P<0.05.