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APA Citation
Scholz, A. F. M., Oldroyd, C., McCarthy, K., Quinn, T. J., & Hewitt, J. (2016). systematic review and meta-analysis of risk factors for postoperative delirium among older patients undergoing gastrointestinal surgery. British journal of surgery, 103(2), e21–e28. http://access.bl.uk/ark:/81055/vdc_100122631904.0x000047