CD4 and head and neck squamous cell carcinoma: Further analysis revealed that changes in the somatic copy number of recognized m6A regulator-based signals significantly affect the infiltration of B cells, CD4+T cells, CD8+T cells, neutrophils, macrophages, and dendritic cells in HNSCC (Yi et al., 2020b), consistent with the hypothesis that this m6A regulatory protein plays a key role in HNSCC development.