The effect of comprehensive intervention for childhood obesity on dietary diversity among younger children: Evidence from a school-based randomized controlled trial in China. by Haiquan Xu, Olivier Ecker, Qian Zhang, Songming Du, Ailing Liu, Yanping Li, Xiaoqi Hu, Tingyu Li, Hongwei Guo, Ying Li, Guifa Xu, Weijia Liu, Jun Ma, Junmao Sun, Kevin Chen, Guansheng Ma

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