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. 2004 Aug 3;91(6):1205–1212. doi: 10.1038/sj.bjc.6602079

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Copyright © 2004 Cancer Research UK

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HES staining for morphology of the parental (A) at passage 1 and NB resistant to CPT-11, IGR-NB8-R (B) xenografts at passage 17. Original magnification × 400.