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APA Citation
Duma, A., Helsten, D., Brown, F., Bottros, M. M., & Nagele, P. (2014). the Effect of Nitrous Oxide Anesthesia on Early Postoperative Opioid Consumption and Pain. Regional anesthesia and pain medicine, 39(1), 31–36. http://access.bl.uk/ark:/81055/vdc_100135141227.0x000013