sera from 50 healthy old subjects and from 51 young controls were tested by elisa assays for a panel of autoantibodies , including igm rf , anti-dna , anti-f ( ab ' ) 2 , antithyroglobulin , anti-human albumin , anti-human hemoglobin , anti-secretory component from human iga , and anti-gliadin .
C0004358
autoantibodies
C0035448
rf