1. Department of Medical Sciences, University of Turin, Turin, Italy;
2. Pathology Unit, Department of Laboratory Medicine, Azienda Ospedaliera Città della Salute e della Scienza di Torino, Turin, Italy;
3. Pathology Division, Santa Croce Hospital, Moncalieri, Italy;
4. Pathology Division, Azienda USL Valle d'Aosta, Aosta, Italy;
5. Pathology Division, Valdese Hospital, Turin, Italy;
6. Pathology Division, Martini Hospital, Turin, Italy;
7. Pathology Division, ASL 9, Civile Hospital, Ivrea, Italy;
8. Department of Pathology, Regina Elena National Cancer Institute, Rome, Italy;
9. Division of Pathology, European Institute of Oncology, Milan, Italy;
10. University of Milan School of Medicine, Milan, Italy