title: Crohn disease early in life and hypovitaminosis D: where do we go from here?
authors.forename: John N
authors.initials: JN
authors.lastname: Udall
mesh_terms: D015519:Bone Density; D002118:Calcium / Q000627:therapeutic use; D002648:Child; D003424:Crohn Disease / Q000150:complications* / Q000188:drug therapy / Q000378:metabolism; D006801:Humans; D013256:Steroids / Q000009:adverse effects; D014808:Vitamin D Deficiency / Q000188:drug therapy / Q000209:etiology*
chemical_list: D013256:Steroids; D002118:Calcium