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Lichtwarck-Aschoff M, Helmer A, Kawati R, Lattuada M, Sjöstrand UH, Zügel N, Guttmann J, Hedenstierna G.Lichtwarck-Aschoff M, et al.Br J Anaesth. 2003 Aug;91(2):239-48. doi: 10.1093/bja/aeg169.Br J Anaesth. 2003.PMID: 12878624Free article.