ADAMTS1 and esophageal squamous cell carcinoma: Multivariate Cox regression survival analysis adjusting for age, vascular invasion, T stage, LNM, pathological grade, gender and these classifiers consistently reported strong correlation between these classifiers and shorter survival (Additional file 1: Table S16 and Additional file 2: Figure S11c), indicating that these classifiers except for ADAMTS1 and miR-548k (+)/ADAMTS1 (−) classifiers were potentially servered as independent prognostic factors for outcome in ESCC.