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The comparative effectiveness of tumor necrosis factor-blocking agents in patients with rheumatoid arthritis and patients with ankylosing spondylitis: a six-month, longitudinal, observational, multicenter study.
Heiberg MS, Nordvåg BY, Mikkelsen K, Rødevand E, Kaufmann C, Mowinckel P, Kvien TK. Heiberg MS, et al. Among authors: kvien tk. Arthritis Rheum. 2005 Aug;52(8):2506-12. doi: 10.1002/art.21209. Arthritis Rheum. 2005. PMID: 16052584 Free article. Clinical Trial.
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