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Phase I trial of fluorouracil modulation by N-phosphonacetyl-L-aspartate and 6-methylmercaptopurine riboside: optimization of 6-methylmercaptopurine riboside dose and schedule through biochemical analysis of sequential tumor biopsy specimens.
O'Dwyer PJ, Hudes GR, Colofiore J, Walczak J, Hoffman J, LaCreta FP, Comis RL, Martin DS, Ozols RF. O'Dwyer PJ, et al. Among authors: walczak j. J Natl Cancer Inst. 1991 Sep 4;83(17):1235-40. doi: 10.1093/jnci/83.17.1235. J Natl Cancer Inst. 1991. PMID: 1714507 Clinical Trial.
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