Research Article

Investigations of the Biological Effects of Airborne and Inhalable Substances by Cell-Based In Vitro Methods: Fundamental Improvements to the ALI Concept

Figure 9

Comparison of results from the prevalidation study and ExpoCube exposures of A549 cells to ozone and formaldehyde. Prevalidation data: s.d., t-test (unpaired, two-sided); ExpoCube data: 95% confidence limits, .