NCT03858348 - A Retrospective rEal-life daTa Study to Assess the exaceRbations and Lung functIon in Chronic Obstructive Pulmonary Disease ( COPD ) patiEnts receiVing Fluticasone/Salmeterol Comparing to Those Εscalating in Open-triple Fluticasone/Salmeterol, Long Acting Muscarinic Antagonist (LAMA) Combination | Crick | Crick