Analysis of the HPV-negative/HPV-positive (Supplementary Fig. S7A) and HPV-negative (Fig. 7C) HNSCC data also detected expression of STAT1, ∆Np63, SOX2, and NOTCH3 in HNSCC cells and, to a variable extent, in other cell populations. This evidence concerns the gene STAT1 and head and neck squamous cell carcinoma.