Temporal change in the prevalence of respiratory symptoms and obstructive airways disease 1993–2001
[摘要] There has been little available information regarding secular changes in the prevalence of respiratory symptoms since the mid-1990s.
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[效力级别] [学科分类] 卫生学
[关键词] asthma;pulmonary disease;chronic obstructive;signs and symptoms;respiratory;trends [时效性]
