The association between candidate migraine susceptibility loci and severe migraine phenotype in a clinical sample. - Esserlind AL; Christensen AF; Steinberg S; Grarup N; Pedersen O; Hansen T; Werge T; Hansen TF; Husemoen LL; Linneberg A; Budtz-Jorgensen E; Westergaard ML; et al. (Cephalalgia : an international journal of headache, 2016)