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Serum cytokine/chemokine levels of children with COVID-19. Serum cytokine/chemokine expression of children with COVID-19 during acute phase (n = 19), middle phase (n = 10) and convalescent phase (n = 14) were detected by CBA assay or ELISA. The horizontal line represented medians with interquartile range. Results were analyzed by Mann–Whitney U test. P < 0.05 was considered of significant difference.
