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Back to Action. NAAS. Available [Online] at: https://nass.co.uk/wp-content/uploads/2018/08/Back-to-Action-low-resolution-version.pdf Accessed on 7 May 2019
O’Hea J, and Barlow J. 2009. Physiotherapy management of ankylosing spondylitis. In: S. Porter. Tidy’s Physiotherapy, 14th ed. Elsevier, pp. 523-532.