SLC39A6 and esophageal squamous cell carcinoma: However, using the McNemar test, we did not found the SLC39A6 expression significantly differs between ESCC and their corresponding HGIN tissues (P = 0.076); similarly, the SLC39A6 expression also does not significantly differ between ESCC and their corresponding LGIN tissues (P = 0.229; Additional file 3: Table S2).