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Correlation between serum complement components and inflammatory cytokine/chemokine levels in critical COVID-19 patients who died in hospital. (A) complement fragment C5a (P = 0.005); (B) complement fragment C3a (P < 0.001); (C) factor P (P < 0.001); (D) interleukin 1 β (IL-1β) (P = 0.01); (E) interleukin 6 (IL-6) (P = 0.02); (F) interleukin 8 (IL-8) (P = 0.001).
