Affiliation: | 1. Department of Cariology, Endodontology and Periodontology, University of Leipzig, Leipzig, Germany;2. Department of Pneumology, Ruhrlandklinik, West German Lung Center, University Hospital Essen, University Duisburg‐Essen, Essen, Germany;3. Department of Thoracic Transplantation, University Hospital Essen, University Duisburg‐Essen, Essen, Germany |