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Yli-Hankala A, Kirvelä M, Randell T, Lindgren L.Yli-Hankala A, et al. Among authors: randell t.Acta Anaesthesiol Scand. 1992 Jul;36(5):483-5. doi: 10.1111/j.1399-6576.1992.tb03502.x.Acta Anaesthesiol Scand. 1992.PMID: 1632173