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An erratum to this article is available at http://dx.doi.org/10.1007/BF03010783.
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Whalley, D.G., Lyew, M.A. Malfunctioning unidirectional valves of Ohmeda Series 5 and 5A carbon dioxide absorbers. Can J Anaesth 35, 668–671 (1988). https://doi.org/10.1007/BF03020361
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DOI: https://doi.org/10.1007/BF03020361