title: "D or not D"--that is the question.
authors.forename: T
authors.initials: T
authors.lastname: Thacher
authors.forename: J M
authors.initials: JM
authors.lastname: Pettifor
authors.forename: P R
authors.initials: PR
authors.lastname: Fischer
mesh_terms: D002118:Calcium / Q000172:deficiency; D002136:Calcium, Dietary / Q000008:administration & dosage; D002675:Child, Preschool; D006801:Humans; D007223:Infant; D009549:Nigeria; D012279:Rickets / Q000209:etiology*; D014808:Vitamin D Deficiency / Q000150:complications*
chemical_list: D002136:Calcium, Dietary; D002118:Calcium