Seronegative rheumatoid arthritis in an eight-year longitudinal study.
Tuomi
T
T
National Public Health Institute, Helsinki, Finland.
Aho
K
K
Palosuo
T
T
Kaarela
K
K
von Essen
R
R
Isomäki
H
H
D001172:Arthritis, Rheumatoid / Q000175:diagnosis / Q000276:immunology*; D005188:False Negative Reactions; D005189:False Positive Reactions; D005500:Follow-Up Studies; D006801:Humans; D007124:Immunoenzyme Techniques; D008137:Longitudinal Studies; D011933:Reagent Kits, Diagnostic; D012217:Rheumatoid Factor / Q000032:analysis*
D011933:Reagent Kits, Diagnostic; D012217:Rheumatoid Factor