The impact of tiotropium on mortality when added to inhaled corticosteroids and long-acting beta agonist therapy in COPDPhilip M Short,Douglas Elder,Peter A Williamson,Samuel I W Lipworth,Stuart Schembri,Brian J LipworthEuropean Respiratory Journal(2011)引用 23|浏览4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