TNF and ankylosing spondylitis: To address this question further we started a prospective randomized controlled study “COmparison of the effect of treatment with NSAIDs added to anti-TNF therapy versus anti-TNF therapy alone on progression of StrUctural damage in the spine over two years in patients with ankyLosing spondylitis” (CONSUL) and first results can be expected in 2021 (ClinicalTrials.gov-ID: NCT02758782).