Fig. 2
From: Incidence of back pain in adolescent athletes: a prospective study
![Fig. 2](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs13102-016-0064-7/MediaObjects/13102_2016_64_Fig2_HTML.gif)
Number (frequency: [n]) of athletes per category of the face scale at M2
From: Incidence of back pain in adolescent athletes: a prospective study
Number (frequency: [n]) of athletes per category of the face scale at M2