Role of Tiotropium in Reducing Exacerbations of Chronic Obstructive Pulmonary Disease When Combined With Long‐Acting
β
2
‐Agonists and Inhaled Corticosteroids: The OUTPUL Study
2016 ◽
Vol 56
(11)
◽
pp. 1423-1432
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2015 ◽
Vol 30
◽
pp. 44-50
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2004 ◽
Vol 10
(28)
◽
pp. 3547-3560
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2021 ◽
Vol 203
(1)
◽
pp. 145-148