The use of multiple respiratory inhalers requiring different inhalation techniques has an adverse effect on COPD outcomes [Corrigendum]

"The use of multiple respiratory inhalers requiring different inhalation techniques has an adverse effect on COPD outcomes [Corrigendum]." International Journal of Chronic Obstructive Pulmonary Disease, , p. 1739

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The use of multiple respiratory inhalers requiring different inhalation techniques has an adverse effect on COPD outcomes