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Kebebew E, Greenspan FS, Clark OH, Woeber KA, Grunwell J.Kebebew E, et al.J Am Coll Surg. 2005 Jun;200(6):890-6. doi: 10.1016/j.jamcollsurg.2004.12.011.J Am Coll Surg. 2005.PMID: 15922202