Prevalence of COPD-Defined Airflow Obstruction in Undiagnosed Subjects with Symptoms of Chronic Bronchitis in Primary Care.Amanda Emmett,Christopher Kalberg,Ibrahim Raphiou,Barbara P Yawn,Gary Ruoff, Thomas Littlejohn,David M Mannino,Glenn Cratermag(2009)引用 23|浏览13暂无评分AI 理解论文溯源树样例生成溯源树,研究论文发展脉络Chat Paper正在生成论文摘要