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Curtis JR, Treece PD, Nielsen EL, Gold J, Ciechanowski PS, Shannon SE, Khandelwal N, Young JP, Engelberg RA.Curtis JR, et al. Among authors: shannon se.Am J Respir Crit Care Med. 2016 Jan 15;193(2):154-62. doi: 10.1164/rccm.201505-0900OC.Am J Respir Crit Care Med. 2016.PMID: 26378963Free PMC article.Clinical Trial.