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. 2006 Sep 12;95(7):841–847. doi: 10.1038/sj.bjc.6603352

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Copyright © 2006 Cancer Research UK

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Box and whisker plots, for each surgical firm, showing the distribution of numbers of lymph nodes identified by pathologists in tissue removed during surgery, arranged by the number of procedures undertaken by the surgeon over the period of the study. For the sake of visual clarity outliers and extremes are not shown. Note that the plots are arranged in order of the average (mean) number of nodes removed by firms, but the scale is not linear.