Figure 1. Box-and-whisker plot showing the distribution of patients according to the number of endosonographic criteria of the Catalano et al. [6] classification system (score 1). Boxes represent the interquartile range (IQR: i.e., the middle 50% between the 2nd and 3rd quartiles); whiskers represent the minimum and the maximum value in the absence of outliers or extreme values. We have computed two outliers (open bullets) and one extreme value (asterix) in the non-alcoholic group. (Outliers were defined as values between 1.5 IQRs and 3 IQRs from the end of a box. Values more than 3 IQRs from the end of a box were defined as extreme).