Fig. 1: Comparative analysis of quantitative parameters across laboratories.

a, The distribution of quantitative parameters across laboratories. b, Differences in main variables comparing each laboratory with the average of the data. Data are represented as mean ± s.e.m. and analyzed by ANOVA followed by Dunnett’s post-hoc test. Asterisks indicate statistical differences compared with the average (*P < 0.05, **P < 0.01, ***P < 0.001 and ****P < 0.0001).