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Merkow RP, Bilimoria KY, Cohen ME, Richards K, Ko CY, Hall BL.Merkow RP, et al. Among authors: cohen me.J Am Coll Surg. 2009 Nov;209(5):557-64. doi: 10.1016/j.jamcollsurg.2009.07.003. Epub 2009 Aug 20.J Am Coll Surg. 2009.PMID: 19854394