title: Figure reversal: "A tale of two systems: cardiac cephalalgia vs. migrainous thoracalgia".
authors.affiliation: Department of Medicine (Neurology), Dalhousie University, Halifax, Canada.
authors.forename: R Allan
authors.initials: RA
authors.lastname: Purdy
mesh_terms: D003324:Coronary Artery Disease / Q000150:complications*; D005260:Female; D006261:Headache / Q000150:complications*; D006801:Humans; D008297:Male; D009422:Nervous System Diseases / Q000150:complications*