An initial screen included a bladder cancer panel with 16 proteins (MCP‐1, MIP‐1α, MIP‐1β, IP‐10, IFN‐α, IL‐1α, IL‐1RA, IL‐8, IL‐7, IL‐31, IL‐15, TNF‐β, Eotaxin, SDF‐1α, Rantes, and GRO). Here, CCL3 is linked to urinary bladder cancer.