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APA Citation
Balazcs, E., Sieper, J., Bickham, K., Mehta, A., Frontera, N., Stryszak, P., Popmihajlov, Z., & Peloso, P. (2016). a randomized, clinical trial to assess the relative efficacy and tolerability of two doses of etoricoxib versus naproxen in patients with ankylosing spondylitis. BMC musculoskeletal disorders, 17(1), 1–12. http://access.bl.uk/ark:/81055/vdc_100080882487.0x0000e7