1. HLA antigen frequencies (AF) in the RA panel were assessed for significant deviations from control frequencies by means of a X2 analysis. The strength of association was estimated by calculating relative risks (RR) using the formula of Woolf17 as modified by Haldane.'8 The aetiological (EF) and preventive (PF) fractions were calculated from the RR as
2. Mixed lymphocyte culture typing cells from patients with rheumatoid arthritis;Stastny, P.;Tissue Antigens,1974
3. Associations of the B-cell alloantigen DRw4 with rheumatoid arthritis;Stastny, P.;N Engl J Med,1978
4. Y;Otha, N.; Nishimura;Hum Immunol; Association between HLA and Japanese patients with rheumatoid arthritis,1982
5. Histocompatibility antigens and rheumatoid arthritis;B, Lies R.; P, Messner R.; M, Troup G.;Arthritis Rheum,1972