University Children's Hospital, Milan, Italy
University Children´s Hospital, Hamburg, Germany
Departement of Sports Medicine, University of Heidelberg, Heidelberg, Germany
Dep. of Radiation Oncology, University Hospital of Heidelberg, Heidelberg, Germany
University Hospital Gießen and Marburg GmbH, Gießen, Germany
University Children's Hospital Heidelberg, Cystic Fibrosis Centre, Heidelberg, Baden-Württemberg, Germany
University Children's Hospital Schleswig-Holstein, Lübeck, Germany
Mannheim University Hospital, Mannheim, Germany
Freiburg University Hospital, Freiburg, Baden-Würrtemberg, Germany
Frankfurt (Oder) General Hospital, Frankfurt (Oder), Brandenburg, Germany
Mannheim University Hospital, Mannheim, Baden-Würrtemberg, Germany
Pneumologische Praxis im Zentrum (former: Zentrum für Tabakentwöhnung Stuttgart), Stuttgart, Baden-Württemberg, Germany
Institut für Raucherberatung und Tabakentwöhnung am Gemeinsschaftskrankenhaus Havelhöhe, Berlin, Germany
Klinikum der Universität München - Klinik für Psychiatrie und Psychotherapie, Munich, Bavaria, Germany
University Medical Center Mannheim, Mannheim, Baden-Württemberg, Germany
University Hospital Heidelberg / National Centre for Tumor Diseases, Heidelberg, Germany
University Hospital Mannheim, Dpt. of Surgery, Mannheim, Germany
Klinikum Frankfurt-Höchst, Frankfurt am Main, Germany
University of Heidelberg, Heidelberg, Germany