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De Wolf AM, Freeman JA, Scott VL, Tullock W, Smith DA, Kisor DF, Kerls S, Cook DR.De Wolf AM, et al.Br J Anaesth. 1996 May;76(5):624-8. doi: 10.1093/bja/76.5.624.Br J Anaesth. 1996.PMID: 8688259Free article.