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. 2012 May 30;20:37. doi: 10.1186/1757-7241-20-37

Figure 3.

Figure 3

Horizontal bars show the median, upper and lower end of the box representing 1st and 3rd quartile. Narrow lines above and below the box represent the spread of values. Circles for values with 1.5–3-fold interquartile distance.