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  • Yangzong, Yangzong; Shi, Zumin; Nafstad, Per; Håheim, Lise L; Luobu, Ouzhu; Bjertness, Espen (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2012)
    Background It is well known that the prevalence of asthma has been reported to increase in many places around the world during the last decades. Therefore, the aim of this study was to identify and review ...