TNF and ankylosing spondylitis: Anti-TNF therapy indications include Crohn’s disease (n = 6), psoriasis and/or psoriatic arthritis (n = 8), ankylosing spondylitis (n = 8), rheumatoid arthritis (n = 1), as well as SAPHO (n = 1) and juvenile rheumatoid arthritis (n = 1).