1. Department of Surgery, Netherlands Cancer Institute—Antoni van Leeuwenhoek Hospital , Amsterdam, Netherlands
2. Department of Thoracic Oncology, Netherlands Cancer Institute—Antoni van Leeuwenhoek Hospital , Amsterdam, Netherlands
3. Department of Pulmonary Diseases, Leiden University Medical Center , Leiden, Netherlands
4. Department of Statistics, Netherlands Cancer Institute—Antoni van Leeuwenhoek Hospital , Amsterdam, Netherlands