PPBP and carcinoma of esophagus: Similar correlations were observed in esophageal carcinoma, with CXCL1, CXCL2, CXCL3, and PPBP negatively correlated with EMT, CXCL5 and CXCL6 positively correlated with EMT, and CXCL8 not correlated with EMT.