1)Zeidler H, Amor B:The Assessment in Spondyloarthritis International Society(ASAS)classification criteria for peripheral spondyloarthritis and for spondyloarthritis in general;The spondyloarthritis concept in progress.Ann Rheum Dis 70:1-3,2011
2)van der Heijde D, Maksymowych WP:Spondyloarthritis;State of the art and future perspectives.Ann Rheum Dis 69:949-954,2010
3)Braun J, Inman R:Clinical significance of inflammatory back pain for diagnosis and screening of patients with axial spondyloarthritis.Ann Rheum Dis 69:1264-1268,2010
4)Rudwaleit M, et al:The development of Assessment of Spondyloarthritis International Society classification criteria for axial spondyloarthritis(part I);Classification of paper patients by expert opinion including uncertainty appraisal. Ann Rheum Dis 68:770-776,2009
5)Sieper J, et al:The Assessment of Spondyloarthritis International Society(ASAS)handbook;A guide to assess spondyloarthritis. Ann Rheum Dis 68(Suppl 2):ii1-ii44,2009