Figure 1: Experimental setup for the exposure of rats to ClO2 gas or air using an “exposure chamber”. The top-down view (upper) and lateral view (lower) of the ClO2-exposure chamber are shown. ClO2 gas sampling ports are shown and numbered 1 through 5. An “air-exposure chamber” had the same construction as the ClO2-exposure chamber except that a ClO2 generator was omitted.