Figure 7

Exposure chamber dosimetry investigated using NRU; cytotoxicity in H292 cells exposed to a smoke dilution of 1:60 (smoke:air, v/v) in 12 mm Transwells^® in a single exposure chamber. Dotted line represents 50% viability (EC₅₀). Mean viability = 46 ± 9.8%, p = 0.56, n = 20.