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de Boode, W.P., Vrancken, S.L., Lemson, J. et al. Gold standard must be solid gold. Intensive Care Med 39, 1330–1331 (2013). https://doi.org/10.1007/s00134-013-2924-x
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DOI: https://doi.org/10.1007/s00134-013-2924-x