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APA Citation
Geboes, K., Riddell, R., Öst, A., Jensfelt, B., Persson, T., & Löfberg, R. (2000). a reproducible grading scale for histological assessment of inflammation in ulcerative colitis. Gut, 47(3), 404–409. http://access.bl.uk/ark:/81055/vdc_100137791124.0x000044