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APA Citation
Stamoulos, P., Ansari, A., Stenner, J., Mackenzie, G., & McSorley, H. (n.d.). azathioprine/allopurinol co-therapy is an effective treatment for patients with inflammatory bowel disease who exhibit no response or side-effects to thiopurines without the need for metabolite level measurements. Gut, 60, A218–A219. http://access.bl.uk/ark:/81055/vdc_100135145581.0x00003f