posted on 2014-10-31, 03:50authored byYang 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.