The quality of COPD care in German general practice - A cross-sectional study - Heinmüller, Stefan; Schaubroeck, Emmily; Frank, Luca; Höfle, Anina; Langer, Michael; Saggau, Korbinian; Schedlbauer, Angela; Kühlein, Thomas (Friedrich-Alexander-Universität Erlangen-Nürnberg, 2020)