Fig. 1
From: Serum selenium level and cancer risk: a nested case-control study
![Fig. 1](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs13053-019-0131-7/MediaObjects/13053_2019_131_Fig1_HTML.png)
Distribution of serum selenium levels in cases and controls
From: Serum selenium level and cancer risk: a nested case-control study
Distribution of serum selenium levels in cases and controls