Figure 4
(a) Comparison of the present mass deposition in the RTECE (curved nozzle) and Vitrocell systems after exposure to four cigarettes, with error bars denoting the standard deviations among six replicates. The numbers over each bar show the corresponding p values. (b) Comparison of the published mass depositions in Vitocell22,34 to that in the British American Tobacco (BAT) exposure chamber34,38,39,40. Solid error bars represent standard deviations among replicates and different sources, and dashed bars indicate the extent of values involved.
