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Ankylosing Spondylitis
Spondylarthropathies
Spondylarthritis
Reactive Arthritis
Mexico
HLA-B27 Antigen
HLA-B15 Antigen
HLA-DR1 Antigen
HLA-B Antigens
Severity of Illness Index
Gene Frequency
Confidence Intervals
Pain Measurement
Reproducibility of Results
Sensitivity and Specificity
Translations
Alleles
Genotype
Case Control Studies
Sacroiliac Joint
Co-Publications
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