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APA Citation
Weil, J., Langman, M. J. S., Wainwright, P., Lawson, D. H., Rawlins, M., Logan, R. F. A., Brown, T. P., Vessey, M. P., Murphy, M., & Colin-Jones, D. G. (2000). peptic ulcer bleeding: accessory risk factors and interactions with non-steroidal anti-inflammatory drugs. Gut, 46(1), 27–31. http://access.bl.uk/ark:/81055/vdc_100144723365.0x00003d