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Cancer and Leukemia Group B 89901; Ryan DP, Niedzwiecki D, Hollis D, Mediema BE, Wadler S, Tepper JE, Goldberg RM, Mayer RJ.Cancer and Leukemia Group B 89901, et al. Among authors: mayer rj.J Clin Oncol. 2006 Jun 1;24(16):2557-62. doi: 10.1200/JCO.2006.05.6754. Epub 2006 Apr 24.J Clin Oncol. 2006.PMID: 16636336Clinical Trial.