%0 Journal Article %J Rheumatology (United Kingdom) %D 2013 %T Protective effect of an ERAP1 haplotype in ankylosing spondylitis: Investigating non-MHC genes in HLA-B27-positive individuals %A Bettencourt, B.F. %A Rocha, F.L. %A Alves, H. %A Amorim, R. %A Caetano-Lopes, J. %A Vieira-Sousa, E. %A Pimentel-Santos, F. %A Lima, M. %A Porto, G. %A Branco, J.C. %A Fonseca, J.E. %A Bruges-Armas, J. %B Rheumatology (United Kingdom) %V 52 %P 2168 - 2176 %8 2013 %G eng %U http://www.scopus.com/inward/record.url?eid=2-s2.0-84887669101&partnerID=40&md5=cfc19a3d6d49b44450b78d40c59c0514 %N 12