1. Department of Radiotherapy, European Institute of Oncology, Milan, Italy;
2. Department of Oncology and Radiotherapy, Medical University of Gdansk, Gdansk, Poland;
3. Department of Medical Oncology, Hospital of San Giovanni Antica Sede, Turin, Italy;
4. Department of Radiotherapy, Molinette Hospital, Turin; Italy
5. Department of Pathology, University of Turin, Turin, Italy
6. Faculty of Medicine, University of Milan; Poland;