DHFR and nasopharyngeal carcinoma: Processes with the biggest number of overlapped genes were related to uterus adaptation during pregnancy (MTHFD2, ATIC, SLC25A32, SHMT2, GART, MAT2A, MTRR, BHMT, DHFR, FPGS, and MTHFD1) [56], and nasopharyngeal carcinoma (MTR, MTHFD2, ATIC, SLC25A32, SHMT2, TYMS, AHCY, GART, MAT2A, MTRR, DHFR, and MTHFD2L) [52].