SLC39A4 and head and neck squamous cell carcinoma: The upregulation of SLC39A4 (Supplementary Figure S1) was observed in bladder urothelial carcinoma (BLCA), breast invasive carcinoma (BRCA), CESC, colon adenocarcinoma (COAD), DLBC, esophageal carcinoma (ESCA), head and neck squamous cell carcinoma (HNSC), lung adenocarcinoma (LUAD), lung squamous cell carcinoma (LUSC), ovarian serous cystadenocarcinoma (OV), PAAD, rectum adenocarcinoma (READ), stomach adenocarcinoma (STAD), THYM, uterine corpus endometrial carcinoma (UCEC), and uterine carcinosarcoma (UCS).