Individuals who express HLA-B27 are 90 times more likely to develop the autoimmune disorder ankylosing spondylitis than individuals with a different HLA allele at this locus. This leads to the conclusion that
A. HLA-B27 causes ankylosing spondylitis.
B. individuals with HLA-B27 will develop ankylosing spondylitis.
C. autoimmune disorders must have genetic components.
D. patients with ankylosing spondylitis express HLA-B27.
E. None of the above is true.
E
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