Screen time, physical activity and mental health among urban adolescents in China.

  title={Screen time, physical activity and mental health among urban adolescents in China.},
  author={Hui Cao and Qing-wen Qian and Ting-ting Weng and Chang-qiong Yuan and Ying Sun and Hui Wang and Fangbiao Tao},
  journal={Preventive medicine},
  volume={53 4-5},

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