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Flowchart showing inclusion criteria for the samples of adolescents in this two-phase design study.

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posted on 2014-10-31, 03:50 authored by Yang Xiaoli, Jiang Chao, Pan Wen, Xu Wenming, Liang Fang, Li Ning, Mu Huijuan, Na Jun, Lv Ming, An Xiaoxia, Yu Chuanyou, Fu Zenguo, Li Lili, Yu Lianzheng, Tong Lijuan, Pan Guowei

Flowchart showing inclusion criteria for the samples of adolescents in this two-phase design study.

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