1. Malaviya AN, Mehra NK, Adhar G et al (1979) HLA B27 in patients with seronegative spondarthritides. J Rheumatol 6:413–416
2. Mitsui H, Sonozaki H (1981) Ankylosing spondylitis in Japan. Ryumachi 21(Suppl):45–49
3. Murata H, Inoue T (1993) Ankylosing spondylitis. Nippon Rinsho 51(Suppl):938–945
4. Hukuda S, Minami M, Saito T et al (2001) Spondyloarthropathies in Japan: nationwide questionnaire survey performed by the Japan Ankylosing Spondylitis Society. J Rheumatol 28:554–559
5. van der Linden S, Valkenburg HA, Cats A (1984) Evaluation of diagnostic criteria for ankylosing spondylitis. A proposal for modification of the New York criteria. Arthritis Rheum 27:361–368