Studies DNA methylation studied DNA Methylation p-value Hypomethylated Hypermethylated No Change   Czikk [26] DUSP9     ✔   Yuen [39] CAPG, GLI2, KRT13, TIMP3 ✔     <0.05 Xiang [37] LEP, SP1, LP1, CEBPalpha ✔     <0.05 Xiang [37] CGI34   ✔   <0.05 Xiang [37] SH3PXD2A ✔     <0.05

Table 5: Results of DNA methylation studies.