Impact of Free Glasses and a Teacher Incentive on Children's Use of Eyeglasses: A Cluster-Randomized Controlled Trial.
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N. Congdon | K. Naidoo | S. Rozelle | Linxiu Zhang | Xiaochen Ma | H. Minto | Lina Lu | H. Zou | Hongmei Yi | Ling Jin | Xiuqin Wang | Haiqing Zhang