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Gnerlich JL, Deshpande AD, Jeffe DB, Sweet A, White N, Margenthaler JA.Gnerlich JL, et al.J Am Coll Surg. 2009 Mar;208(3):341-7. doi: 10.1016/j.jamcollsurg.2008.12.001. Epub 2009 Jan 21.J Am Coll Surg. 2009.PMID: 19317994Free PMC article.