High-density SNP mapping of the HLA region identifies multiple independent susceptibility loci associated with selective IgA deficiency.
Ferreira RC, Pan-Hammarström Q, Graham RR, Fontán G, Lee AT, Ortmann W, Wang N, Urcelay E, Fernández-Arquero M, Núñez C, et al. PLoS Genet. 2012 Jan; 8(1):e1002476. Epub 2012 Jan 26.