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APA Citation
Gatta, L., Ricci, C., Tampieri, A., Osborn, J., Perna, F., Bernabucci, V., & Vaira, D. (2006). accuracy of breath tests using low doses of 13C-urea to diagnose Helicobacter pylori infection: a randomised controlled trial. Gut, 55(4), 457–462. http://access.bl.uk/ark:/81055/vdc_100137792996.0x000048