Andreas, Stefan Röver, Christian Heinz, Judith Straube, Sebastian Watz, Henrik Friede, Tim Additional file 3: of Decline of COPD exacerbations in clinical trials over two decades – a systematic review and meta-regression The PRISMA checklist. (PDF 671 kb) COPD;COPD exacerbations;Meta-analysis;Inhaled glucocorticosteroids 2019-08-17
    https://springernature.figshare.com/articles/journal_contribution/Additional_file_3_of_Decline_of_COPD_exacerbations_in_clinical_trials_over_two_decades_a_systematic_review_and_meta-regression/9641375
10.6084/m9.figshare.9641375.v1