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Neutrophil number in intra-alveolar septa of the lung of newborn male (M) and female (F) Wistar rats in two control groups (F, M) and on the 1st day after LPS injection (F + LPS, M + LPS). Symbols: ∗ means that differences are statistically significant as compared with the corresponding control group; ∧ means that differences are statistically significant as compared with the LPS injected females.
