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APA Citation
Then, E., Uhlenhopp, D., Lopez, M., Sunkara, T., Culliford, A., & Gaduputi, V. (n.d.). s0208 Chronic Obstructive Pulmonary Disease (COPD) Is Associated With Worse Outcomes in Ischemic Colitis: A Nationwide Retrospective Study. American journal of gastroenterology, 115, S68. http://access.bl.uk/ark:/81055/vdc_100168589826.0x000032