Immigration of GMC over time.

Mean values±s.e.m. were calculated using a linear mixed-effects model including the random factor animal and the interaction between group and time.本研究采用纳入随机因子「动物」以及分组与时间交互效应的线性混合效应模型，计算得到平均值±标准误（standard error of the mean，s.e.m.）。