Fig. 5

(A) The duration of exposures used by articles in the database. The plot is split by the overall percentage breakdown and those for each study motivation. The percentage values are calculated within each study motivation. (B) The number of different doses used (excluding the control), as shown by study motivation. The percentage values are calculated within each study motivation. (C) The distribution of minimum and maximum dose used, as well as the within-study dose range (i.e. maximum– minimum). The x-axis (dose µg/L) is plotted on a log10 scale for the density plots and ‘eye plots’. The eye plot shows the median, 89, and 95% intervals. The text with the eye plot shows the raw (untransformed) median value and is used to aid in comparisons across study motivations