TNF and infection: In case of infection-related markers, CRP (59%; 1,211 of 2,051 cases), ESR (58%; 1,191 of 2,051 cases), IL-6 (51%; 1,047 of 2,051 cases) and serum ferritin (58%; 1,192 of 2,051 cases) were elevated in more than half of the population, followed by TNF-α (47%; 971 of 2,051 cases), PCT (26%; 534 of 2,051 cases), IL-10 (13%; 269 of 2,051 cases) and IL-8 (8%; 174 of 2,051 cases).