1. Department of Pathology, Hospital of Treviso, Italy
2. Department of Pathology, Hospital of Belluno, Italy
3. Experimental Oncology I, CRO, Aviano, Italy
4. Institute of Pathology, Jena, Germany
5. Department of Pathology, Hospital of Trento, Italy
6. Department of Pathology, Brigham & Women's Hospital, Harvard Medical School, Boston, U.S.A.