Serum concentrations of α tocopherol, β carotene, and retinol preceding the diagnosis of rheumatoid arthritis and systemic lupus erythematosus
G W Comstock, A E Burke, S C Hoffman, K J Helzlsouer, A Bendich, A T Masi, E P Norkus, R L Malamet, M E Gershwin
Annals of the Rheumatic Diseases May 1997, 56 (5) 323-325; DOI: 10.1136/ard.56.5.323
