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Kirvelä M, Yli-Hankala A, Lindgren L.Kirvelä M, et al.Acta Anaesthesiol Scand. 1994 Oct;38(7):662-6. doi: 10.1111/j.1399-6576.1994.tb03974.x.Acta Anaesthesiol Scand. 1994.PMID: 7839774Clinical Trial.
Kirvelä M, Yli-Hankala A, Lindgren L.Kirvelä M, et al.Br J Anaesth. 1994 Dec;73(6):801-4. doi: 10.1093/bja/73.6.801.Br J Anaesth. 1994.PMID: 7880670Free article.