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Leen E, Horgan PG.Leen E, et al. Among authors: horgan pg.Surg Oncol. 2007 Jul;16(1):47-51. doi: 10.1016/j.suronc.2007.04.004. Epub 2007 May 11.Surg Oncol. 2007.PMID: 17499499Review.