ZIC1 and esophageal squamous cell carcinoma: Core regulatory miRNAs of miR-520a, miR-548am, miR-3184, miR-548d, miR-4725, miR-148a, miR-4659a and key regulatory transcriptional factors of MBNL1, SLC26A3, BMP4, ZIC1 and ANKRD7 might provide biological insight into the full repertoire of nCRT response of ESCC.