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Background: Published data regarding changes in the prevalence of childhood allergic diseases in Japan have been limited. Methods: To observe changes in the recent trends of the childhood allergy epi...
BA prevalence in the third survey increased 2.1 and 1.4 times respectively compared to the first survey and second survey, indicating an upward trend in all regions and age groups surveyed.
The prevalence of asthma has been increasing in Japan, like in other parts of the world. Asthma management guidelines were developed in Japan in 1993 and 1998. These guidelines have been shown to cont...

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