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. 2017 Jun 10;7(6):e014591. doi: 10.1136/bmjopen-2016-014591

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Design of the Comparison of the effect of treatment with Non-steroidal anti-inflammatory drugs added to antitumour necrosis factor (anti-TNF) therapy versus anti-TNF therapy alone on progression of StrUctural damage in the spine over 2 years in patients with ankyLosing spondylitis (CONSUL) study.