title: Global occurrence.
authors.forename: D S
authors.initials: DS
authors.lastname: McLaren
authors.forename: K
authors.initials: K
authors.lastname: Kraemer
mesh_terms: D000293:Adolescent; D001766:Blindness / Q000453:epidemiology / Q000209:etiology; D002648:Child; D002675:Child, Preschool; D004032:Diet; D005260:Female; D005504:Food Analysis; D006306:Health Surveys; D006801:Humans; D009755:Night Blindness / Q000453:epidemiology / Q000209:etiology; D011247:Pregnancy; D014801:Vitamin A / Q000008:administration & dosage / Q000032:analysis / Q000097:blood; D014802:Vitamin A Deficiency / Q000150:complications / Q000453:epidemiology*; D014944:World Health Organization
chemical_list: D014801:Vitamin A