1. HLA-DRβ genes vary in number between different DR specificities, whereas the number of DQβ genes is constant;Böhme;J Immunol,1985
2. Structural relationships between the DRβ1 and DRβ2 subunits in DR4, 7 and w9 haplotypes and the DRw53 (MT3) specificity;Matsuyama;J Immunol,1986
3. Five HLA-D clusters associated with HLA-DR4;Reinsmoen;Hum Immunol,1982
4. Sequence polymorphism of HLA-DRβ1 alleles relating to T-cell-recognized determinants;Cairns;Nature,1985
5. Molecular diversity of HLA-DR4 haplotypes;Gregersen,1986