title: Is headache related with vitamin D insufficiency?
authors.forename: Yi
authors.initials: Y
authors.lastname: Yang
authors.forename: Hong-Liang
authors.initials: HL
authors.lastname: Zhang
authors.forename: Jiang
authors.initials: J
authors.lastname: Wu
mesh_terms: D001057:Apolipoproteins E / Q000378:metabolism; D015897:Comorbidity; D020773:Headache Disorders / Q000175:diagnosis / Q000453:epidemiology* / Q000378:metabolism; D006801:Humans; D015203:Reproducibility of Results; D012621:Seasons; D014808:Vitamin D Deficiency / Q000175:diagnosis / Q000453:epidemiology* / Q000378:metabolism
chemical_list: D001057:Apolipoproteins E