Fig. 1From: Serum cell-free DNA methylation of OPCML and HOXD9 as a biomarker that may aid in differential diagnosis between cholangiocarcinoma and other biliary diseasesScatter plots of OPCML, HOXA9, and HOXD9 methylation in serum cfDNA between other biliary diseases and CCA patients. a OPCML, b HOXA9, and c HOXD9 methylation levels were determined by MS-HRM. The Mann-Whitney U test was used to compare between these groups. P values < 0.05 were considered statistically significantBack to article page