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Box plots of platelets count (a), spleen size (b), and platelets count to spleen size ratio (c) according to the stage of oesophageal varices. The box represents the interquartile range; the top and the bottom of the box are, respectively, the 25th and 75th percentile. The line across the box is the median. The lower and upper values are indicated by the whiskers. Stars and circles represent the outliers and extreme values.
