1. Department of Experimental Oncology, European Institute of Oncology, Milan, Italy.
2. Department of Histology and Medical Embryology,
3. Department of Morphological Science, University of Camerino, Italy.
4. Wellcome/CRC Institute and Department of Pathology, Cambridge University, Cambridge, UK.
5. Department of Cellular Biotechnology and Hematology, University of Rome, “La Sapienza,” Rome, Italy.
6. Italian Foundation for Cancer Research (FIRC) Institute for Molecular Oncology, Milan, Italy.