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Long AC, Kross EK, Engelberg RA, Downey L, Nielsen EL, Back AL, Curtis JR.Long AC, et al. Among authors: downey l.Intensive Care Med. 2014 Nov;40(11):1688-97. doi: 10.1007/s00134-014-3425-2. Epub 2014 Aug 13.Intensive Care Med. 2014.PMID: 25116294Free PMC article.Clinical Trial.