STT3B and head and neck squamous cell carcinoma: By analysis of the correlation between EREG and these glycosyltransferase genes in HNSCC patients using data from TCGA, we found that only STT3B was closely and positively correlated with EREG in HNSCC tissues (Supplementary Fig. 6b), and Western blot suggested that EREG and STT3B proteins expression showed positive correlation in HNSCC cell lines (Supplementary Fig. 6c).