Comparison in the constraining power between the DDSTG model and the method based on measured PK parameters with the DD model. Both methods calculate χ² values for a grid in {α₀, β₀} space, each point corresponds to a unique theory. β₀ values are presented by the colour, while α₀ values cover the [−10⁻¹, −10⁻⁴] range. Red vertical line corresponds to the 90% CL limit, all points to the left are allowed by the test.