1. Seronegative spondyloarthropathies—to lump or split?;Nash;Ann Rheum Dis,2005
2. Psoriatic arthritis: epidemiology, clinical features, course, and outcome;Gladman;Ann Rheum Dis,2005
3. Tumor necrosis factor alpha blockade treatment down-modulates the increased systemic and local expression of Toll-like receptor 2 and Toll-like receptor 4 in spondylarthropathy;De Rycke;Arthritis Rheum,2005
4. Synovial histopathology of psoriatic arthritis, either oligo-or polyarticular, resembles more spondyloarthropathy than rheumatoid arthritis;Kruithof;Arthritis Res Ther,2005
5. Psoriatic arthritis: clinical features;Helliwell,2000