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Danis M, Linde-Zwirble WT, Astor A, Lidicker JR, Angus DC.Danis M, et al.Crit Care Med. 2006 Aug;34(8):2043-8. doi: 10.1097/01.CCM.0000227657.75270.C4.Crit Care Med. 2006.PMID: 16763518