Cohort study of the correlation between screen time and emotional problems in primary school students across the COVID-19 pandemic
HAN Yaohui, DONG Fang, SUN Xiaoya, LI Lihong, YANG Weiting, LIN Yin
Chinese Journal of Child Health Care . 2023, (12): 1314 -1319 .  DOI: 10.11852/zgetbjzz2023-0567


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