IL4 and central nervous system cancer: Clinical trials of glioma DC vaccines from the perspective of cultured mature DC DTH: Delayed type hypersensitivity; GAA: Glioma associate antigen; GM‐CSF: Granulocyte‐macrophage colony‐stimulating factor; IFN‐α: Interferon‐α; IFN‐γ: Interferon‐γ; IL‐4: Interleukin‐4; IL‐6: Interleukin‐6; IL‐1β: Interleukin‐1β; OS: Overall Survival; PFS: Progression‐free survival; PGE‐2:Prostaglandin E2; poly‐IC: Polyinosinic‐ Polycytidylic acid; TNF‐α: Tumor necrosis factor‐α; TTP: Time to progression.