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Essink-Bot ML, de Koning HJ, Nijs HG, Kirkels WJ, van der Maas PJ, Schröder FH.Essink-Bot ML, et al. Among authors: schroder fh.J Natl Cancer Inst. 1998 Jun 17;90(12):925-31. doi: 10.1093/jnci/90.12.925.J Natl Cancer Inst. 1998.PMID: 9637143