title: Hemicrania continua is not that rare.
authors.forename: Egilius L H
authors.initials: EL
authors.lastname: Spierings
authors.forename: Ottar
authors.initials: O
authors.lastname: Sjaastad
mesh_terms: D002908:Chronic Disease; D006801:Humans; D008881:Migraine Disorders / Q000145:classification* / Q000175:diagnosis* / Q000188:drug therapy