References
- Gran JT, Husby G. Clinical, epidemiologic and therapeutic aspects of ankylosing spondylitis Curr Opin Rheumatol 1998;10:292–8.
- Khan MA, van der Linden SM. A wider spectrum of spondyloarthropathies Semin Arthritis Rheum 1990;20:107–13.
- Shichikawa K, Takenata Y, Yukioka M, Ikawa T. Poly-enthesitis Rheum Dis Clin North Am 1992;18:203–13.
- Secundini R, Scheines EJ, Gusis SE, Riopedre AM, Citera G, Cocco JAM. Clinoco-Radiological correlation of enthesitis in seronegativespondyloarthropa-thiesClinRheumatol1997;16:129–32.
- Riise T, Gram IT, Honda Y. Rheumatoid arthritis: a commonly misused diagnosis by the general population Scand J Rheumatol 1996;25 Suppl 106:43.
- Kellgren JH, Jeffrey MR, Ball J. The epidemiology of chronic rheumatism Oxford, England. Blackwell Scientific Publica-tions. 1963;1:326.
- Gran JT. An epidemiological survey of the signs and symptoms of ankylosing spondylitis Clin Rheumatol 1985;4:161–9.
- Underwood MR, Dawes P. Inflammatory back pain in primary care Br J Rheumatol 1995;34:1074–7.
- Boyer GS, Templin DW, Goring WP. Evaluation of the European spondylarthropathy study group preliminary classi-fication criteria in Alaskan eskimo populations Arthritis Rheum 1993;36:534–8.
- Braun J, Bollow M, Remlinger G, Eggens U, Rudwaleit M, Distler A, et al. Prevalence of spondyloarthropathies in HLA-B27 positive and negative blood donors Arthritis Rheum 1998;41: 58–67.
- Boyer GS, Templin DW, Bowler A, Lawrence RC, Heyse SP, Everett DF, et al. Class I HLA antigens in spondyloarthro-pathy: Observations in Alaskan eskimo patients and controls J Rheumatol 1997;24:500–6.
- Aggarwal A, Misra R, Chandrasekhar S, Prasad KN, Dayal R, Ayyagari A. Is undifferentiated seronegative spondyloar-thropathy a forme fruste of reactive arthritis? Br J Rheumatol 1997;36:1001–4.
- Uppal SS, Pande I, Singh G, Kailash S, Kakker R, Kumar A. et al. Profile of HLA-B27-related "unclassifiable" seronegative spondyloarthropathy in females and its comparison with the profile in males Br J Rheumatol 1995;34: 137–40.
- Olivieri I, Cantini F, Salvarani C. Diagnostic and classifica-tion criteria, clinical and functional assessment, and ther-apeutic advances for spondyloarthropathies CUff Opin Rheumatol 1997;9:284–90.
- Dougados M. Diagnostic features of ankylosing spondylitis Br J Rheumatol 1995;34:301–5.
- Wright W. Arthropathia psoriatica. A clinical entity? Scand J Rheumatol 1980;9 Suppl 32:25–30.