analyses of data on pairwise combinations of rheumatoid arthritis ( ra ) , autoimmune thyroid disease ( atd ) , and insulin-dependent ( type i ) diabetes mellitus ( iddm ) suggest that ( a ) iddm is predisposed by two hla-linked alleles , one of which also predisposes to atd , ( b ) one of the iddm alleles also confers susceptibility to ra , and ( c ) although the hla-linked susceptibilities to ra and atd appear to be primarily due to distinct alleles , the atd allele may also have a minor role in predisposition to ra .
C0021641
insulin
C0011854
iddm