"This study suggests that polytransfused patients with SCA possessing the HLA-DQB1*03 and HLA-C*06 allele variants are more susceptible to alloimmunisation. In addition HLA-DRB1*04 and HLA-DRB1*11 alleles were seen to be associated with the production of anti-Fy(a) and anti-K antibodies respectively."xsd:string