The classic way of investigating the genetic component of a disease by twin studies reveals a highly significant genetic contribution to AS, and one in which HLA-B27 is the major but by no means the only factor ( Figure 2 ) ( 13 ).
1
—
—
The classic way of investigating the genetic component of a disease by twin studies reveals a highly significant genetic contribution to AS, and one in which HLA-B27 is the major but by no means the only factor ( Figure 2 ) ( 13 ).