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. 2022 Jun 20;92(5):1350–1356. doi: 10.1038/s41390-022-02164-y

Fig. 2. Plasma urea and creatinine levels in extremely preterm neonates, according to gestational age.

Fig. 2

Each point represents the mean daily value; when multiple measurements were performed in a single day, the median value was kept. When no measurement was obtained, the daily value was extrapolated from linear interpolation of the two closest values. Error bars indicate the 95th confidence interval for the mean.