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van der Heijde D, Lie E, Kvien TK, Sieper J, Van den Bosch F, Listing J, Braun J, Landewé R; Assessment of SpondyloArthritis international Society (ASAS).van der Heijde D, et al. Among authors: sieper j.Ann Rheum Dis. 2009 Dec;68(12):1811-8. doi: 10.1136/ard.2008.100826. Epub 2008 Dec 5.Ann Rheum Dis. 2009.PMID: 19060001Clinical Trial.
Sieper J, Braun J.Sieper J, et al.Dtsch Med Wochenschr. 1993 May 14;118(19):712-8. doi: 10.1055/s-2008-1059383.Dtsch Med Wochenschr. 1993.PMID: 8500415Review.German.No abstract available.