title: Vitamin D insufficiency.
authors.forename: Ian H
authors.initials: IH
authors.lastname: de Boer
authors.forename: Bryan
authors.initials: B
authors.lastname: Kestenbaum
authors.forename: David S
authors.initials: DS
authors.lastname: Siscovick
mesh_terms: D006801:Humans; D012016:Reference Values; D012621:Seasons; D014807:Vitamin D / Q000031:analogs & derivatives* / Q000097:blood; D014808:Vitamin D Deficiency / Q000097:blood / Q000208:ethnology*
chemical_list: D014807:Vitamin D; C104450:25-hydroxyvitamin D