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APA Citation
Chatzidionysiou, K., Eriksson, J., Askling, J., & van Vollenhoven, R. F. (n.d.). efficacy of TNF switch after failure of one TNF inhibitor – results from a nation-wide observational study. Annals of the rheumatic diseases, 71, A14–A15. http://access.bl.uk/ark:/81055/vdc_100137792738.0x00005b