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Gustafsson UO, Hausel J, Thorell A, Ljungqvist O, Soop M, Nygren J; Enhanced Recovery After Surgery Study Group.Gustafsson UO, et al. Among authors: nygren j.Arch Surg. 2011 May;146(5):571-7. doi: 10.1001/archsurg.2010.309. Epub 2011 Jan 17.Arch Surg. 2011.PMID: 21242424