1. Department of Oncology, Academic Hospital of Udine, Azienda Sanitaria Universitaria Friuli Centrale (ASUFC), Piazzale Santa Maria della Misericordia, 33100 Udine, Italy
2. Unit of Oncology 2, Azienda Ospedaliero-Universitaria Pisana, 56126 Pisa, Italy
3. Institute of Interdisciplinary Research “Health Science”, Scuola Superiore Sant’Anna, Piazza Martiri della Libertà 33, 56124 Pisa, Italy
4. Department of Translational Research and New Technologies in Medicine and Surgery, University of Pisa, 56126 Pisa, Italy
5. Unit of Medical Oncology, University Hospital, University of Cagliari, 09124 Cagliari, Italy
6. Division of General and Oncologic Surgery Multimedica, A.O. Santa Croce e Carle, 12100 Cuneo, Italy
7. Department of Oncology, Azienda Sanitaria Locale di Biella, 13900 Ponderano, Italy
8. General and Upper GI Surgery Division, Verona University (VR), 37134 Verona, Italy
9. Department of Oncology, San Bortolo General Hospital, ULSS 8 Berica-Vicenza, 36100 Vicenza, Italy