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Brown CH 4th, Grega M, Selnes OA, McKhann GM, Shah AS, LaFlam A, Savage WJ, Frank SM, Hogue CW, Gottesman RF.Brown CH 4th, et al.Anesth Analg. 2014 Aug;119(2):242-250. doi: 10.1213/ANE.0000000000000134.Anesth Analg. 2014.PMID: 24859077Free PMC article.