Fig. 9
From: Best fitting tumor growth models of the von Bertalanffy-PütterType
Relative growth rates (percent/day) of the best fitting model curves from 2,315 near-optimal exponent-pairs (their SSEopt exceeds the minimal SSE by at most 1%). The shaded area is the region between the minimal and maximal growth rates that some model reached at that day. The blue curve is the relative growth rate computed from the spline interpolation function of Fig. 2 (a method for the numeric differentiation of the data)