CCL3 and sarcoma: Owing to the high level of basal Interferon (IFN)‐I expression in normal cardiac tissues,29 except for IFN‐I‐activated T (IFN‐I T subset), which was enriched in the normal group, other types of T subsets, including DNAJB1 T (DNA damage proteins enriched), Tregs, effector T, exhausted T, migrated T (CCL3 and TYROBP) and naive T, were all enriched in the sarcoma group, indicating that a complex microenvironment induces the diversity of T cells (Figure 6B,C).