1. Department of Thoracic Surgery, Thoraxzentrum Ruhrgebiet, Herne, Germany
2. Department of General Surgery and Urology, Jordan University of Science and Technology, Faculty of Medicine, Irbid, Jordan
3. Department of Respiratory and Infectious Diseases, Thoraxzentrum Ruhrgebiet, Herne, Germany
4. Clinic of Thoracic Surgery, Waldburg-Zeil Clinic, Wangen im Allgäu, Germany