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Rheumatoid Arthritis
Ankylosing Spondylitis
Severity of Illness Index
Cohort Studies
Reproducibility of Results
Health Status
Immunoglobulin A
HLA-DRB1 Chains
HLA-DR Antigens
Penicillamine
alpha 1-Antitrypsin
Antirheumatic Agents
Receptors, Tumor Necrosis Factor, Type II
Rheumatoid Factor
Sulfasalazine
C-Reactive Protein
Blood Sedimentation
Enzyme-Linked Immunosorbent Assay
Smoking
Genetic Predisposition to Disease
Co-Publications
45
20
18
16
10
9
6
5
4
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