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Snyder-Ramos SA, Seintsch H, Böttiger BW, Motsch J, Martin E, Bauer M.Snyder-Ramos SA, et al. Among authors: motsch j.Anesth Analg. 2005 Jun;100(6):1753-1758. doi: 10.1213/01.ANE.0000153010.49776.E5.Anesth Analg. 2005.PMID: 15920209Clinical Trial.