This article is one of ten reviews selected from the Annual Update in Intensive Care and Emergency Medicine 2017. Other selected articles can be found online at http://ccforum.com/series/annualupdate2017 . Further information about the Annual Update in Intensive Care and Emergency Medicine is available from http://www.springer.com/series/8901 .
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Hernández et al. (2017) studied this question.
Synapse has enriched 3 closely related papers on similar clinical questions. Consider them for comparative context: