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APA Citation
Bliddal, H., Overgaard, A., Hartkopp, A., Beier, J., Conaghan, P., & Henriksen, M. (n.d.). polyacrylamide hydrogel injection for knee osteoarthritis: results of a 52 week prospective study. Osteoarthritis and cartilage, 29, S278–. http://access.bl.uk/ark:/81055/vdc_100127499788.0x00001f