Quantitative analyses of sacroiliac biopsies in spondyloarthropathies: T cells and macrophages predominate in early and active sacroiliitis - cellularity correlates with the degree of enhancement detected by magnetic resonance imaging. - Bollow,M.; Fischer,T.; Reisshauer,H.; Backhaus,M.; Sieper,J.; Hamm,B.; Braun,J. (Ann Rheum Dis, 2000)