KDR and endometriosis: One of the differentially methylated sites, cg01340163, located in the KDR gene promoter on 4q12, has an associated mQTL in endometrium where the mQTL SNP (rs12331597) is in high LD (r2 = 0.97) with an endometriosis-associated variant in this locus (rs1903068) (Supplementary Fig. 15).