MERTK and Cluster headache: The four cluster headache susceptibility loci that were identified by this GWAS were rs113658130 near LINC01877/SATB2 (SATB homeobox 2), rs4519530 in MERTK, rs12121134 near LINC01705/DUSP10 (Dual Specificity Phosphatase 10), and rs11153082 in FHL5.