MORF4L2 and esophageal squamous cell carcinoma: In the five-lncRNA suvival prediction model, the high expression level of lncRNA MORF4L2-AS1, AC007179.1 and RP4-735C1.6 were associated with short survival (Cox coefficient > 0), indicating these three lncRNAs were risk lncRNAs for ESCC patients.