Figure 4

Gas vapour phase dose–response. [A] Percentage relative cell survival from three independent experiments, indicating inter- and intra-experimental variation. [B] Mean pooled data from three experiments with a dilution IC₅₀ of approximately 3.2 L/min and a correlation coefficient of R² = 0.92 for the 184 minute exposure to the gas vapour phase of tobacco smoke using 3R4F cigarettes.