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Frawley G, Bell G, Disma N, Withington DE, de Graaff JC, Morton NS, McCann ME, Arnup SJ, Bagshaw O, Wolfler A, Bellinger D, Davidson AJ; General Anesthesia compared to Spinal anesthesia (GAS) Consortium.Frawley G, et al.Anesthesiology. 2015 Jul;123(1):55-65. doi: 10.1097/ALN.0000000000000708.Anesthesiology. 2015.PMID: 26001028Free PMC article.Clinical Trial.