1Brophy S, Mackay K, A1 Saidi A, et al. The natural history of ankylosing spondylitis as defined by radiological progression [J]. J Rheumatol, 2002,29 : 1236-1243.
2Van Der Linden S J, Valkenburg H A, Cals A. Evaluation of diagnostic criteria for ankylosing spondylitis: a proposal for modification of the New York criteria[J]. Arthritis Rheum, 1984,27:361.
3Weiner E S, Abeles M. Aseptic necrosis and glucocorticoste- roids in systemic lupus erythematosus: a reevaluation[J]. J Rheumatol, 1989,16 ; 604-608.
