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徐禕, 严琼, 童连
Associations between screen time and attention deficit and hyperactivity disorder symptoms among urban and rural preschoolers
XU Yi, YAN Qiong, TONG Lian
中国儿童保健杂志 . 2019, (9): 997 -1001 .  DOI: 10.11852/zgetbjzz2019-0001