in an attempt to find common immunogenetic features in b27+ and b27- ankylosing spondylitis patients , the b7 cross reactant antigens ( bw22 , b27 , b40 , b12 , b13 ) were systematically tested by a lymphocytotoxicity method in 43 patients suffering from ankylosing spondylitis according to the rome criteria .
C0003320
antigens
C0301896
lymphocytotoxicity