U2 fitting parameters for the data from [10].

The “spontaneous” growth curve was recorded differently from the successive transplants (see Figure 6A compared to Figure 6B, 6C, and 6D). Hence a different value of a0. Due to the very small values of γ, the improvement between U1 and U2 in Figure 6 is only marginal. The normalized values of the acceleration parameter ρ for the three cases are 0.27, 0.36 and 1., respectively.

“自发”生长曲线的记录方式与连续移植组存在差异（详见图6A与图6B、6C、6D的对比），因此其参数a₀的取值亦不相同。由于γ的取值极小，图6中U1与U2之间的性能提升仅为边际级。三种工况下加速参数ρ的归一化值分别为0.27、0.36和1.0。