CXCL8 and cancer: Scientists demonstrated that in various cancers—including breast, head and neck, lung, colorectal, and stomach—there is a positive correlation between the expression of proinflammatory cytokines (such as IL‐1α, IL‐1β, IL‐6, IL‐8, and TNF‐α) and Fn14, the receptor for TWEAK.2, 301, 302