1. *Laboratory of Pathophysiology, Regina Elena Cancer Institute, Rome, Italy;
2. †Department of Immunobiology, DNAX Research Institute, Palo Alto, CA 94304;
3. ‡Department of Experimental Medicine and Pathology, University of Rome, “La Sapienza”, Rome, Italy;
4. §Department of Genetics, University of Bari, Bari, Italy;
5. ∥Roche Institute, Milan, Italy
6. ¶Laboratory of Vascular Pathology, Istituto Dermopatico dell’Immacolata, Rome, Italy; and