1. Calin, C. (1998) Terminology, introduction, diagnostic criteria, and overview, in The Spondylarthritides (Calin, A. and Taurog, J.D., eds), pp. 1–15, Oxford University Press
2. Espinoza, L.R. and Cuellar, M.L. (1997) Clinical aspects of the spondyloarthropathies, in HLA-B27 in The Development of Spondyloarthropathies (López-Larrea, C., ed.), pp. 1–16, Landes Austin
3. Ankylosing spondylitis and HL-A 27;Brewerton;Lancet,1973
4. High association of an HLA antigen, W27, with ankylosing spondylitis;Schlosstein;New Engl. J. Med.,1973
5. Khan, M.A. (1997) Prevalence of HLA-B27 in world populations, in HLA-B27 in The Development of Spondyloarthropathies (López-Larrea, C., ed.), pp. 95–112, Landes Austin