François François RJ RJ Neure Neure L L Sieper Sieper J J Braun Braun J J Immunohistologic examination of open sacroiliac biopsies of patients with ankylosing spondylitis: detection of tumor necrosis factor α in two early cases and transforming growth factor β in three later stages Immunohistologic examination of open sacroiliac biopsies of patients with ankylosing spondylitis: detection of tumor necrosis factor α in two early cases and transforming growth factor β in three later stages Ann Rheum Dis Ann Rheum Dis 2006 2006 65 65 6 6 713 713 720 720 supplied-pmid 16249231? Here, TNF is linked to ankylosing spondylitis.