ninety-one sera of persons above 80 years of age were screened for autoantibody activity against lipoproteins ( anti-ldl 7 , anti-hdl 6 positive ) , for rheumatoid factor activity ( latex 14 , waaler-rose 7 positive ) and for antinuclear factors ( 11 positive ) .
C0004358
autoantibody
C0003243
antinuclear factors