8Gran JT, Skomsvotl JF. The outcome of ankylosing spondylitis: a study of 100 patients[J]. Br J Rheumatol ,1997,36(7) :766.
9Boulos Haraoui, Marilyn Krelenbaum, Emergence of Crohn's Disease During Treatment with the Anti - Tumor Necrosis Factor Agent Etanercept for Ankylosing Spondylitis : Possible Mechanisms of Action [J].Seminars in Arthritis and Rheumatism,In Press,Corrected Proof, Available online at www. sciencedirect, com ,2008,8,15
10Haibel H, Rudwaleit M, Braun J, et al. Six months open label trial of leflunomide in active ankylosing spondylitis [ J ]. Ann Rheum Dis, 2005, 64(1) :124
