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Köhne, C. H. and Schöffski, P. and Wilke, H. and Käufer, C. and Andreesen, Reinhard and Ohl, U. and Klaasen, U. and Westerhausen, M. and Hiddemann, W. and Schott, G. and Harstick, A. and Bade, J. and Horster, A. and Schubert, U. and Hecker, H. and Dörken, B. and Schmoll, H. J. (1998) Effective biomodulation by leucovorin of high-dose infusion fluorouracil given as a weekly 24-hour infusion: results of a randomized trial in patients with advanced colorectal cancer. Journal of clinical oncology : official journal of the American Society of Clinical Oncology 16 (2), pp. 418-26.