1. Department of Experimental Medicine; Sapienza University of Rome; Rome Italy
2. Department of Endocrinology and Diabetes; Università Campus Bio-Medico; Rome Italy
3. Centre for Immunology, St. Bartholomew's Hospital and the London School of Medicine, Queen Mary; University of London; London UK
4. Bristol-Myers Squibb; Princeton NJ USA
5. MedImmune; Gaithersburg MD USA