1. Division of Thoracic Surgery and Hyperbaric Surgery, Department of Surgery, Medical University of Graz, 8036 Graz, Austria
2. Division of Pulmonology, Department of Internal Medicine, Medical University of Graz, 8036 Graz, Austria
3. Division of Oncology, Department of Internal Medicine, Medical University of Graz, 8036 Graz, Austria
4. Department of Experimental Therapeutics, The UT MD Anderson Cancer Center, Houston, TX 77030, USA
5. Institute of Medical Informatics, Statistics and Documentation, Medical University of Graz, 8036 Graz, Austria