title: Vitamin D in rheumatoid arthritis.
authors.forename: Hans-Jacob
authors.initials: HJ
authors.lastname: Haga
mesh_terms: D001172:Arthritis, Rheumatoid / Q000453:epidemiology* / Q000276:immunology*; D002986:Clinical Trials as Topic; D018450:Disease Progression; D006801:Humans; D015995:Prevalence; D012307:Risk Factors; D014807:Vitamin D / Q000276:immunology / Q000378:metabolism*; D014808:Vitamin D Deficiency / Q000453:epidemiology* / Q000276:immunology*
chemical_list: D014807:Vitamin D