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Wong CA, Fragen RJ, Fitzgerald PC, McCarthy RJ.Wong CA, et al. Among authors: fitzgerald pc.Anesth Analg. 2005 Jan;100(1):141-148. doi: 10.1213/01.ANE.0000138057.61904.FD.Anesth Analg. 2005.PMID: 15616068Clinical Trial.