. 2017 Dec 1;8:254. doi: 10.3389/fpsyt.2017.00254
Copyright © 2017 Ma, Wen, Cui, Yuan, Yang, Jiang, Jiang, Huo, Sun, Han, Su, Yang, Payne, Wang and Li.
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Figure 1.
The prevalence of current smoking in male and female adults by age.