4Stone M A, Inman R D, Wright J G, et al. Validation exercise of the ankylosing spondylitis assessment study ( ASAS ) group response criteria in ankylosing spondylitis patients treated with biologics [ J ]. Arthritis Care Res ,2004,51 ( 3 ) :316-320.
5Jois R N, Leeder J, Gibb A, et al. Low-dose infliximab treatment for ankylosing spondylitis-clinically-and cost- effective[ J]. Rheumatol,2006,45 (12) : 1566-1569.