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Ouyang YQ, zur Hausen A, Orlowska-Volk M, Jäger M, Bettendorf H, Hirschfeld M, Tong XW, Stickeler E.Ouyang YQ, et al. Among authors: hirschfeld m.Int J Cancer. 2011 May 1;128(9):2010-9. doi: 10.1002/ijc.25544.Int J Cancer. 2011.PMID: 20607830Free article.