Open Access Open Badges Research article

The prevalence of childhood asthma in China: a systematic review

Yangzong Yangzong*, Zumin Shi, Per Nafstad, Lise Lund Håheim, Ouzhu Luobu and Espen Bjertness

BMC Public Health 2012, 12:860  doi:10.1186/1471-2458-12-860

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