<style face="normal" font="default" size="100%">Factors associated with adolescents' overweight and obesity at community, school, and household levels in Xi'an City, China - results of hierarchical analysis</style>

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<style face="normal" font="default" size="100%">Factors associated with adolescents' overweight and obesity at community, school, and household levels in Xi'an City, China - results of hierarchical analysis</style>