SLC25A21 and migraine disorder: The women-specific (GERA + UKB) meta-analysis (22,500 migraine cases and 279,762 controls) identified 19 loci (P < 5.0 × 10−8), of which three, CPS1 on chromosome 2, PBRM1 on chromosome 3, and SLC25A21 on chromosome 14, were additional novel loci (Fig. 2 and Supplementary Data 5).