5 Department of Thoracic Surgery, Medical University of Vienna, Vienna, Austria.
6 Ruhrlandklinik - West German Lung Center University Hospital Essen, Essen, Germany.
7 Division of Thoracic Surgery, Department of Visceral, Thoracic and Vascular Surgery, Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany.
8 National Center for Tumor Diseases (NCT/UCC), TU Dresden, Dresden, Sachsen, Germany.
9 German Cancer Research Center (DKFZ), Heidelberg, Germany.