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Givol N, Gershtansky Y, Halamish-Shani T, Taicher S, Perel A, Segal E.Givol N, et al.J Clin Anesth. 2004 May;16(3):173-6. doi: 10.1016/j.jclinane.2003.06.004.J Clin Anesth. 2004.PMID: 15217655